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40<body > 
41  <table border="0" cellpadding="0" cellspacing="0"> 
42  <tr bgcolor="orange"><th></th><th>&nbsp;draft-ietf-httpbis-p7-auth-00.txt&nbsp;</th><th> </th><th>&nbsp;draft-ietf-httpbis-p7-auth-01.txt&nbsp;</th><th></th></tr> 
43      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
44      <tr><td class="lineno" valign="top"></td><td class="left">Network Working Group                                   R. Fielding, Ed.</td><td> </td><td class="right">Network Working Group                                   R. Fielding, Ed.</td><td class="lineno" valign="top"></td></tr>
45      <tr><td class="lineno" valign="top"></td><td class="left">Internet-Draft                                              Day Software</td><td> </td><td class="right">Internet-Draft                                              Day Software</td><td class="lineno" valign="top"></td></tr>
46      <tr><td><a name="diff0001" /></td></tr>
47      <tr><td class="lineno" valign="top"></td><td class="lblock">Obsoletes: <span class="delete">2068,</span> 2616                                          J. Gettys</td><td> </td><td class="rblock">Obsoletes: 2616 <span class="insert">(if approved)</span>                                  J. Gettys</td><td class="lineno" valign="top"></td></tr>
48      <tr><td class="lineno" valign="top"></td><td class="lblock">(if approved)                                       One Laptop per Child</td><td> </td><td class="rblock"><span class="insert">Updates: 2617</span> (if approved)                         One Laptop per Child</td><td class="lineno" valign="top"></td></tr>
49      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">Updates: 2617 (if approved)                                     J. Mogul</span></td><td> </td><td class="rblock">Intended status: Standards Track                                <span class="insert">J. Mogul</span></td><td class="lineno" valign="top"></td></tr>
50      <tr><td class="lineno" valign="top"></td><td class="lblock">Intended status: Standards Track                                      <span class="delete">HP</span></td><td> </td><td class="rblock">Expires: <span class="insert">July 15,</span> 2008                                                <span class="insert">HP</span></td><td class="lineno" valign="top"></td></tr>
51      <tr><td class="lineno" valign="top"></td><td class="lblock">Expires: <span class="delete">June 22,</span> 2008                                        H. Frystyk</td><td> </td><td class="rblock">                                                              H. Frystyk</td><td class="lineno" valign="top"></td></tr>
52      <tr><td class="lineno" valign="top"></td><td class="left">                                                               Microsoft</td><td> </td><td class="right">                                                               Microsoft</td><td class="lineno" valign="top"></td></tr>
53      <tr><td class="lineno" valign="top"></td><td class="left">                                                             L. Masinter</td><td> </td><td class="right">                                                             L. Masinter</td><td class="lineno" valign="top"></td></tr>
54      <tr><td class="lineno" valign="top"></td><td class="left">                                                           Adobe Systems</td><td> </td><td class="right">                                                           Adobe Systems</td><td class="lineno" valign="top"></td></tr>
55      <tr><td class="lineno" valign="top"></td><td class="left">                                                                P. Leach</td><td> </td><td class="right">                                                                P. Leach</td><td class="lineno" valign="top"></td></tr>
56      <tr><td class="lineno" valign="top"></td><td class="left">                                                               Microsoft</td><td> </td><td class="right">                                                               Microsoft</td><td class="lineno" valign="top"></td></tr>
57      <tr><td class="lineno" valign="top"></td><td class="left">                                                          T. Berners-Lee</td><td> </td><td class="right">                                                          T. Berners-Lee</td><td class="lineno" valign="top"></td></tr>
58      <tr><td class="lineno" valign="top"></td><td class="left">                                                                 W3C/MIT</td><td> </td><td class="right">                                                                 W3C/MIT</td><td class="lineno" valign="top"></td></tr>
59      <tr><td><a name="diff0002" /></td></tr>
60      <tr><td class="lineno" valign="top"></td><td class="lblock">                                                       <span class="delete">December 20, 2007</span></td><td> </td><td class="rblock">                                                           <span class="insert">Y. Lafon, Ed.</span></td><td class="lineno" valign="top"></td></tr>
61      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">                                                                     W3C</span></td><td class="lineno" valign="top"></td></tr>
62      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">                                                         J. Reschke, Ed.</span></td><td class="lineno" valign="top"></td></tr>
63      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">                                                              greenbytes</span></td><td class="lineno" valign="top"></td></tr>
64      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">                                                        January 12, 2008</span></td><td class="lineno" valign="top"></td></tr>
65      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
66      <tr><td class="lineno" valign="top"></td><td class="left">                    HTTP/1.1, part 7: Authentication</td><td> </td><td class="right">                    HTTP/1.1, part 7: Authentication</td><td class="lineno" valign="top"></td></tr>
67      <tr><td><a name="diff0003" /></td></tr>
68      <tr><td class="lineno" valign="top"></td><td class="lblock">                     draft-ietf-httpbis-p7-auth-0<span class="delete">0</span></td><td> </td><td class="rblock">                     draft-ietf-httpbis-p7-auth-0<span class="insert">1</span></td><td class="lineno" valign="top"></td></tr>
69      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
70      <tr><td class="lineno" valign="top"></td><td class="left">Status of this Memo</td><td> </td><td class="right">Status of this Memo</td><td class="lineno" valign="top"></td></tr>
71      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
72      <tr><td class="lineno" valign="top"></td><td class="left">   By submitting this Internet-Draft, each author represents that any</td><td> </td><td class="right">   By submitting this Internet-Draft, each author represents that any</td><td class="lineno" valign="top"></td></tr>
73      <tr><td class="lineno" valign="top"></td><td class="left">   applicable patent or other IPR claims of which he or she is aware</td><td> </td><td class="right">   applicable patent or other IPR claims of which he or she is aware</td><td class="lineno" valign="top"></td></tr>
74      <tr><td class="lineno" valign="top"></td><td class="left">   have been or will be disclosed, and any of which he or she becomes</td><td> </td><td class="right">   have been or will be disclosed, and any of which he or she becomes</td><td class="lineno" valign="top"></td></tr>
75      <tr><td class="lineno" valign="top"></td><td class="left">   aware will be disclosed, in accordance with Section 6 of BCP 79.</td><td> </td><td class="right">   aware will be disclosed, in accordance with Section 6 of BCP 79.</td><td class="lineno" valign="top"></td></tr>
76      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
77      <tr><td class="lineno" valign="top"></td><td class="left">   Internet-Drafts are working documents of the Internet Engineering</td><td> </td><td class="right">   Internet-Drafts are working documents of the Internet Engineering</td><td class="lineno" valign="top"></td></tr>
78      <tr><td class="lineno" valign="top"></td><td class="left">   Task Force (IETF), its areas, and its working groups.  Note that</td><td> </td><td class="right">   Task Force (IETF), its areas, and its working groups.  Note that</td><td class="lineno" valign="top"></td></tr>
79      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
80      <tr bgcolor="gray" ><td></td><th><a name="part-l2" /><small>skipping to change at</small><em> page 1, line 45</em></th><th> </th><th><a name="part-r2" /><small>skipping to change at</small><em> page 1, line 49</em></th><td></td></tr>
81      <tr><td class="lineno" valign="top"></td><td class="left">   and may be updated, replaced, or obsoleted by other documents at any</td><td> </td><td class="right">   and may be updated, replaced, or obsoleted by other documents at any</td><td class="lineno" valign="top"></td></tr>
82      <tr><td class="lineno" valign="top"></td><td class="left">   time.  It is inappropriate to use Internet-Drafts as reference</td><td> </td><td class="right">   time.  It is inappropriate to use Internet-Drafts as reference</td><td class="lineno" valign="top"></td></tr>
83      <tr><td class="lineno" valign="top"></td><td class="left">   material or to cite them other than as "work in progress."</td><td> </td><td class="right">   material or to cite them other than as "work in progress."</td><td class="lineno" valign="top"></td></tr>
84      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
85      <tr><td class="lineno" valign="top"></td><td class="left">   The list of current Internet-Drafts can be accessed at</td><td> </td><td class="right">   The list of current Internet-Drafts can be accessed at</td><td class="lineno" valign="top"></td></tr>
86      <tr><td class="lineno" valign="top"></td><td class="left">   http://www.ietf.org/ietf/1id-abstracts.txt.</td><td> </td><td class="right">   http://www.ietf.org/ietf/1id-abstracts.txt.</td><td class="lineno" valign="top"></td></tr>
87      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
88      <tr><td class="lineno" valign="top"></td><td class="left">   The list of Internet-Draft Shadow Directories can be accessed at</td><td> </td><td class="right">   The list of Internet-Draft Shadow Directories can be accessed at</td><td class="lineno" valign="top"></td></tr>
89      <tr><td class="lineno" valign="top"></td><td class="left">   http://www.ietf.org/shadow.html.</td><td> </td><td class="right">   http://www.ietf.org/shadow.html.</td><td class="lineno" valign="top"></td></tr>
90      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
91      <tr><td><a name="diff0004" /></td></tr>
92      <tr><td class="lineno" valign="top"></td><td class="lblock">   This Internet-Draft will expire on Ju<span class="delete">ne 22</span>, 2008.</td><td> </td><td class="rblock">   This Internet-Draft will expire on Ju<span class="insert">ly 15</span>, 2008.</td><td class="lineno" valign="top"></td></tr>
93      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
94      <tr><td class="lineno" valign="top"></td><td class="left">Copyright Notice</td><td> </td><td class="right">Copyright Notice</td><td class="lineno" valign="top"></td></tr>
95      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
96      <tr><td><a name="diff0005" /></td></tr>
97      <tr><td class="lineno" valign="top"></td><td class="lblock">   Copyright (C) The IETF Trust (200<span class="delete">7</span>).</td><td> </td><td class="rblock">   Copyright (C) The IETF Trust (200<span class="insert">8</span>).</td><td class="lineno" valign="top"></td></tr>
98      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
99      <tr><td class="lineno" valign="top"></td><td class="left">Abstract</td><td> </td><td class="right">Abstract</td><td class="lineno" valign="top"></td></tr>
100      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
101      <tr><td class="lineno" valign="top"></td><td class="left">   The Hypertext Transfer Protocol (HTTP) is an application-level</td><td> </td><td class="right">   The Hypertext Transfer Protocol (HTTP) is an application-level</td><td class="lineno" valign="top"></td></tr>
102      <tr><td class="lineno" valign="top"></td><td class="left">   protocol for distributed, collaborative, hypermedia information</td><td> </td><td class="right">   protocol for distributed, collaborative, hypermedia information</td><td class="lineno" valign="top"></td></tr>
103      <tr><td class="lineno" valign="top"></td><td class="left">   systems.  HTTP has been in use by the World Wide Web global</td><td> </td><td class="right">   systems.  HTTP has been in use by the World Wide Web global</td><td class="lineno" valign="top"></td></tr>
104      <tr><td class="lineno" valign="top"></td><td class="left">   information initiative since 1990.  This document is Part 7 of the</td><td> </td><td class="right">   information initiative since 1990.  This document is Part 7 of the</td><td class="lineno" valign="top"></td></tr>
105      <tr><td class="lineno" valign="top"></td><td class="left">   seven-part specification that defines the protocol referred to as</td><td> </td><td class="right">   seven-part specification that defines the protocol referred to as</td><td class="lineno" valign="top"></td></tr>
106      <tr><td class="lineno" valign="top"></td><td class="left">   "HTTP/1.1" and, taken together, obsoletes RFC 2616.  Part 7 defines</td><td> </td><td class="right">   "HTTP/1.1" and, taken together, obsoletes RFC 2616.  Part 7 defines</td><td class="lineno" valign="top"></td></tr>
107      <tr><td class="lineno" valign="top"></td><td class="left">   HTTP Authentication.</td><td> </td><td class="right">   HTTP Authentication.</td><td class="lineno" valign="top"></td></tr>
108      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
109      <tr><td class="lineno" valign="top"></td><td class="left">Editorial Note (To be removed by RFC Editor)</td><td> </td><td class="right">Editorial Note (To be removed by RFC Editor)</td><td class="lineno" valign="top"></td></tr>
110      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
111      <tr><td><a name="diff0006" /></td></tr>
112      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">This version of the HTTP specification contains only minimal</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
113      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   editorial changes from [RFC2616] (abstract, introductory paragraph,</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
114      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   and authors' addresses).  All other changes are due to partitioning</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
115      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   the original into seven mostly independent parts.  The intent is for</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
116      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   readers of future drafts to able to use draft 00 as the basis for</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
117      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   comparison when the WG makes later changes to the specification text.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
118      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   This draft will shortly be followed by draft 01 (containing the first</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
119      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   round of changes that have already been agreed to on the mailing</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
120      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   list).  There is no point in reviewing this draft other than to</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
121      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   verify that the partitioning has been done correctly.  Roy T.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
122      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   Fielding, Yves Lafon, and Julian Reschke will be the editors after</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
123      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   draft 00 is submitted.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
124      <tr><td class="lineno" valign="top"></td><td class="lblock">                                                                         </td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
125      <tr><td class="lineno" valign="top"></td><td class="left">   Discussion of this draft should take place on the HTTPBIS working</td><td> </td><td class="right">   Discussion of this draft should take place on the HTTPBIS working</td><td class="lineno" valign="top"></td></tr>
126      <tr><td class="lineno" valign="top"></td><td class="left">   group mailing list (ietf-http-wg@w3.org).  The current issues list is</td><td> </td><td class="right">   group mailing list (ietf-http-wg@w3.org).  The current issues list is</td><td class="lineno" valign="top"></td></tr>
127      <tr><td><a name="diff0007" /></td></tr>
128      <tr><td class="lineno" valign="top"></td><td class="lblock">   at &lt;http://www<span class="delete">3</span>.tools.ietf.org/wg/httpbis/trac/report/11&gt; and related</td><td> </td><td class="rblock">   at &lt;http://www.tools.ietf.org/wg/httpbis/trac/report/11&gt; and related</td><td class="lineno" valign="top"></td></tr>
129      <tr><td class="lineno" valign="top"></td><td class="left">   documents (including fancy diffs) can be found at</td><td> </td><td class="right">   documents (including fancy diffs) can be found at</td><td class="lineno" valign="top"></td></tr>
130      <tr><td><a name="diff0008" /></td></tr>
131      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">&lt;http://www3.tools.ietf.org/wg/httpbis/&gt;.</span></td><td> </td><td class="rblock">   <span class="insert">&lt;http://www.tools.ietf.org/wg/httpbis/&gt;.</span></td><td class="lineno" valign="top"></td></tr>
132      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
133      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   This draft incorporates those issue resolutions that were either</span></td><td class="lineno" valign="top"></td></tr>
134      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   collected in the original RFC2616 errata list</span></td><td class="lineno" valign="top"></td></tr>
135      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   (&lt;http://purl.org/NET/http-errata&gt;), or which were agreed upon on the</span></td><td class="lineno" valign="top"></td></tr>
136      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   mailing list between October 2006 and November 2007 (as published in</span></td><td class="lineno" valign="top"></td></tr>
137      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   "draft-lafon-rfc2616bis-03").</span></td><td class="lineno" valign="top"></td></tr>
138      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
139      <tr><td class="lineno" valign="top"></td><td class="left">Table of Contents</td><td> </td><td class="right">Table of Contents</td><td class="lineno" valign="top"></td></tr>
140      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
141      <tr><td class="lineno" valign="top"></td><td class="left">   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4</td><td> </td><td class="right">   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4</td><td class="lineno" valign="top"></td></tr>
142      <tr><td><a name="diff0009" /></td></tr>
143      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     1.1.  Requirements . . . . . . . . . . . . . . . . . . . . . . .  4</span></td><td class="lineno" valign="top"></td></tr>
144      <tr><td class="lineno" valign="top"></td><td class="left">   2.  Status Code Definitions  . . . . . . . . . . . . . . . . . . .  4</td><td> </td><td class="right">   2.  Status Code Definitions  . . . . . . . . . . . . . . . . . . .  4</td><td class="lineno" valign="top"></td></tr>
145      <tr><td class="lineno" valign="top"></td><td class="left">     2.1.  401 Unauthorized . . . . . . . . . . . . . . . . . . . . .  4</td><td> </td><td class="right">     2.1.  401 Unauthorized . . . . . . . . . . . . . . . . . . . . .  4</td><td class="lineno" valign="top"></td></tr>
146      <tr><td><a name="diff0010" /></td></tr>
147      <tr><td class="lineno" valign="top"></td><td class="lblock">     2.2.  407 Proxy Authentication Required  . . . . . . . . . . . .  <span class="delete">4</span></td><td> </td><td class="rblock">     2.2.  407 Proxy Authentication Required  . . . . . . . . . . . .  <span class="insert">5</span></td><td class="lineno" valign="top"></td></tr>
148      <tr><td class="lineno" valign="top"></td><td class="left">   3.  Header Field Definitions . . . . . . . . . . . . . . . . . . .  5</td><td> </td><td class="right">   3.  Header Field Definitions . . . . . . . . . . . . . . . . . . .  5</td><td class="lineno" valign="top"></td></tr>
149      <tr><td class="lineno" valign="top"></td><td class="left">     3.1.  Authorization  . . . . . . . . . . . . . . . . . . . . . .  5</td><td> </td><td class="right">     3.1.  Authorization  . . . . . . . . . . . . . . . . . . . . . .  5</td><td class="lineno" valign="top"></td></tr>
150      <tr><td class="lineno" valign="top"></td><td class="left">     3.2.  Proxy-Authenticate . . . . . . . . . . . . . . . . . . . .  6</td><td> </td><td class="right">     3.2.  Proxy-Authenticate . . . . . . . . . . . . . . . . . . . .  6</td><td class="lineno" valign="top"></td></tr>
151      <tr><td class="lineno" valign="top"></td><td class="left">     3.3.  Proxy-Authorization  . . . . . . . . . . . . . . . . . . .  6</td><td> </td><td class="right">     3.3.  Proxy-Authorization  . . . . . . . . . . . . . . . . . . .  6</td><td class="lineno" valign="top"></td></tr>
152      <tr><td><a name="diff0011" /></td></tr>
153      <tr><td class="lineno" valign="top"></td><td class="lblock">     3.4.  WWW-Authenticate . . . . . . . . . . . . . . . . . . . . .  <span class="delete">6</span></td><td> </td><td class="rblock">     3.4.  WWW-Authenticate . . . . . . . . . . . . . . . . . . . . .  <span class="insert">7</span></td><td class="lineno" valign="top"></td></tr>
154      <tr><td class="lineno" valign="top"></td><td class="left">   4.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  7</td><td> </td><td class="right">   4.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  7</td><td class="lineno" valign="top"></td></tr>
155      <tr><td class="lineno" valign="top"></td><td class="left">   5.  Security Considerations  . . . . . . . . . . . . . . . . . . .  7</td><td> </td><td class="right">   5.  Security Considerations  . . . . . . . . . . . . . . . . . . .  7</td><td class="lineno" valign="top"></td></tr>
156      <tr><td class="lineno" valign="top"></td><td class="left">     5.1.  Authentication Credentials and Idle Clients  . . . . . . .  7</td><td> </td><td class="right">     5.1.  Authentication Credentials and Idle Clients  . . . . . . .  7</td><td class="lineno" valign="top"></td></tr>
157      <tr><td class="lineno" valign="top"></td><td class="left">   6.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . .  8</td><td> </td><td class="right">   6.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . .  8</td><td class="lineno" valign="top"></td></tr>
158      <tr><td class="lineno" valign="top"></td><td class="left">   7.  References . . . . . . . . . . . . . . . . . . . . . . . . . .  8</td><td> </td><td class="right">   7.  References . . . . . . . . . . . . . . . . . . . . . . . . . .  8</td><td class="lineno" valign="top"></td></tr>
159      <tr><td><a name="diff0012" /></td></tr>
160      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">Index</span>  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8</td><td> </td><td class="rblock">     <span class="insert">7.1.  Normative References . . . . . . .</span> . . . . . . . . . . . .  <span class="insert">8</span></td><td class="lineno" valign="top"></td></tr>
161      <tr><td class="lineno" valign="top"></td><td class="lblock">   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . .  <span class="delete">9</span></td><td> </td><td class="rblock"><span class="insert">     7.2.  Informative References</span> . . . . . . . . . . . . . . . . . .  8</td><td class="lineno" valign="top"></td></tr>
162      <tr><td class="lineno" valign="top"></td><td class="lblock">   Intellectual Property and Copyright Statements . . . . . . . . . . <span class="delete">11</span></td><td> </td><td class="rblock">   <span class="insert">Appendix A.  Compatibility with Previous Versions  . . . . . . . .  9</span></td><td class="lineno" valign="top"></td></tr>
163      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     A.1.  Changes from RFC 2616  . . . . . . . . . . . . . . . . . .  9</span></td><td class="lineno" valign="top"></td></tr>
164      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Appendix B.  Change Log (to be removed by RFC Editor before</span></td><td class="lineno" valign="top"></td></tr>
165      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">                publication)  . . . . . . . . . . . . . . . . . . . .  9</span></td><td class="lineno" valign="top"></td></tr>
166      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     B.1.  Since RFC2616  . . . . . . . . . . . . . . . . . . . . . .  9</span></td><td class="lineno" valign="top"></td></tr>
167      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     B.2.  Since draft-ietf-httpbis-p7-auth-00  . . . . . . . . . . .  9</span></td><td class="lineno" valign="top"></td></tr>
168      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9</span></td><td class="lineno" valign="top"></td></tr>
169      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . <span class="insert">10</span></td><td class="lineno" valign="top"></td></tr>
170      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   Intellectual Property and Copyright Statements . . . . . . . . . . <span class="insert">13</span></td><td class="lineno" valign="top"></td></tr>
171      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
172      <tr><td class="lineno" valign="top"></td><td class="left">1.  Introduction</td><td> </td><td class="right">1.  Introduction</td><td class="lineno" valign="top"></td></tr>
173      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
174      <tr><td><a name="diff0013" /></td></tr>
175      <tr><td class="lineno" valign="top"></td><td class="lblock">   This document <span class="delete">will define aspects of HTTP related to</span> access control</td><td> </td><td class="rblock">   This document <span class="insert">defines HTTP/1.1</span> access control and authentication.</td><td class="lineno" valign="top"></td></tr>
176      <tr><td class="lineno" valign="top"></td><td class="lblock">   and authentication.  Right now it <span class="delete">only</span> includes the extracted</td><td> </td><td class="rblock">   Right now it includes the extracted relevant sections of RFC 2616</td><td class="lineno" valign="top"></td></tr>
177      <tr><td class="lineno" valign="top"></td><td class="lblock">   relevant sections of RFC 2616 <span class="delete">[RFC2616]</span> with only minor <span class="delete">edits.</span></td><td> </td><td class="rblock">   with only minor <span class="insert">changes.  The intention is to move the general</span></td><td class="lineno" valign="top"></td></tr>
178      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   framework for HTTP authentication here, as currently specified in</span></td><td class="lineno" valign="top"></td></tr>
179      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   [RFC2617], and allow the individual authentication mechanisms to be</span></td><td class="lineno" valign="top"></td></tr>
180      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   defined elsewhere.  This introduction will be rewritten when that</span></td><td class="lineno" valign="top"></td></tr>
181      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   occurs.</span></td><td class="lineno" valign="top"></td></tr>
182      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
183      <tr><td class="lineno" valign="top"></td><td class="left">   HTTP provides several OPTIONAL challenge-response authentication</td><td> </td><td class="right">   HTTP provides several OPTIONAL challenge-response authentication</td><td class="lineno" valign="top"></td></tr>
184      <tr><td class="lineno" valign="top"></td><td class="left">   mechanisms which can be used by a server to challenge a client</td><td> </td><td class="right">   mechanisms which can be used by a server to challenge a client</td><td class="lineno" valign="top"></td></tr>
185      <tr><td class="lineno" valign="top"></td><td class="left">   request and by a client to provide authentication information.  The</td><td> </td><td class="right">   request and by a client to provide authentication information.  The</td><td class="lineno" valign="top"></td></tr>
186      <tr><td class="lineno" valign="top"></td><td class="left">   general framework for access authentication, and the specification of</td><td> </td><td class="right">   general framework for access authentication, and the specification of</td><td class="lineno" valign="top"></td></tr>
187      <tr><td class="lineno" valign="top"></td><td class="left">   "basic" and "digest" authentication, are specified in "HTTP</td><td> </td><td class="right">   "basic" and "digest" authentication, are specified in "HTTP</td><td class="lineno" valign="top"></td></tr>
188      <tr><td class="lineno" valign="top"></td><td class="left">   Authentication: Basic and Digest Access Authentication" [RFC2617].</td><td> </td><td class="right">   Authentication: Basic and Digest Access Authentication" [RFC2617].</td><td class="lineno" valign="top"></td></tr>
189      <tr><td class="lineno" valign="top"></td><td class="left">   This specification adopts the definitions of "challenge" and</td><td> </td><td class="right">   This specification adopts the definitions of "challenge" and</td><td class="lineno" valign="top"></td></tr>
190      <tr><td class="lineno" valign="top"></td><td class="left">   "credentials" from that specification.</td><td> </td><td class="right">   "credentials" from that specification.</td><td class="lineno" valign="top"></td></tr>
191      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
192      <tr><td><a name="diff0014" /></td></tr>
193      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">1.1.  Requirements</span></td><td class="lineno" valign="top"></td></tr>
194      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
195      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",</span></td><td class="lineno" valign="top"></td></tr>
196      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this</span></td><td class="lineno" valign="top"></td></tr>
197      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   document are to be interpreted as described in [RFC2119].</span></td><td class="lineno" valign="top"></td></tr>
198      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
199      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   An implementation is not compliant if it fails to satisfy one or more</span></td><td class="lineno" valign="top"></td></tr>
200      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   of the MUST or REQUIRED level requirements for the protocols it</span></td><td class="lineno" valign="top"></td></tr>
201      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   implements.  An implementation that satisfies all the MUST or</span></td><td class="lineno" valign="top"></td></tr>
202      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   REQUIRED level and all the SHOULD level requirements for its</span></td><td class="lineno" valign="top"></td></tr>
203      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   protocols is said to be "unconditionally compliant"; one that</span></td><td class="lineno" valign="top"></td></tr>
204      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   satisfies all the MUST level requirements but not all the SHOULD</span></td><td class="lineno" valign="top"></td></tr>
205      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   level requirements for its protocols is said to be "conditionally</span></td><td class="lineno" valign="top"></td></tr>
206      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   compliant."</span></td><td class="lineno" valign="top"></td></tr>
207      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
208      <tr><td class="lineno" valign="top"></td><td class="left">2.  Status Code Definitions</td><td> </td><td class="right">2.  Status Code Definitions</td><td class="lineno" valign="top"></td></tr>
209      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
210      <tr><td class="lineno" valign="top"></td><td class="left">2.1.  401 Unauthorized</td><td> </td><td class="right">2.1.  401 Unauthorized</td><td class="lineno" valign="top"></td></tr>
211      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
212      <tr><td class="lineno" valign="top"></td><td class="left">   The request requires user authentication.  The response MUST include</td><td> </td><td class="right">   The request requires user authentication.  The response MUST include</td><td class="lineno" valign="top"></td></tr>
213      <tr><td class="lineno" valign="top"></td><td class="left">   a WWW-Authenticate header field (Section 3.4) containing a challenge</td><td> </td><td class="right">   a WWW-Authenticate header field (Section 3.4) containing a challenge</td><td class="lineno" valign="top"></td></tr>
214      <tr><td class="lineno" valign="top"></td><td class="left">   applicable to the requested resource.  The client MAY repeat the</td><td> </td><td class="right">   applicable to the requested resource.  The client MAY repeat the</td><td class="lineno" valign="top"></td></tr>
215      <tr><td class="lineno" valign="top"></td><td class="left">   request with a suitable Authorization header field (Section 3.1).  If</td><td> </td><td class="right">   request with a suitable Authorization header field (Section 3.1).  If</td><td class="lineno" valign="top"></td></tr>
216      <tr><td class="lineno" valign="top"></td><td class="left">   the request already included Authorization credentials, then the 401</td><td> </td><td class="right">   the request already included Authorization credentials, then the 401</td><td class="lineno" valign="top"></td></tr>
217      <tr><td class="lineno" valign="top"></td><td class="left">   response indicates that authorization has been refused for those</td><td> </td><td class="right">   response indicates that authorization has been refused for those</td><td class="lineno" valign="top"></td></tr>
218      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
219      <tr bgcolor="gray" ><td></td><th><a name="part-l3" /><small>skipping to change at</small><em> page 5, line 7</em></th><th> </th><th><a name="part-r3" /><small>skipping to change at</small><em> page 5, line 22</em></th><td></td></tr>
220      <tr><td class="lineno" valign="top"></td><td class="left">   client must first authenticate itself with the proxy.  The proxy MUST</td><td> </td><td class="right">   client must first authenticate itself with the proxy.  The proxy MUST</td><td class="lineno" valign="top"></td></tr>
221      <tr><td class="lineno" valign="top"></td><td class="left">   return a Proxy-Authenticate header field (Section 3.2) containing a</td><td> </td><td class="right">   return a Proxy-Authenticate header field (Section 3.2) containing a</td><td class="lineno" valign="top"></td></tr>
222      <tr><td class="lineno" valign="top"></td><td class="left">   challenge applicable to the proxy for the requested resource.  The</td><td> </td><td class="right">   challenge applicable to the proxy for the requested resource.  The</td><td class="lineno" valign="top"></td></tr>
223      <tr><td class="lineno" valign="top"></td><td class="left">   client MAY repeat the request with a suitable Proxy-Authorization</td><td> </td><td class="right">   client MAY repeat the request with a suitable Proxy-Authorization</td><td class="lineno" valign="top"></td></tr>
224      <tr><td class="lineno" valign="top"></td><td class="left">   header field (Section 3.3).  HTTP access authentication is explained</td><td> </td><td class="right">   header field (Section 3.3).  HTTP access authentication is explained</td><td class="lineno" valign="top"></td></tr>
225      <tr><td class="lineno" valign="top"></td><td class="left">   in "HTTP Authentication: Basic and Digest Access Authentication"</td><td> </td><td class="right">   in "HTTP Authentication: Basic and Digest Access Authentication"</td><td class="lineno" valign="top"></td></tr>
226      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC2617].</td><td> </td><td class="right">   [RFC2617].</td><td class="lineno" valign="top"></td></tr>
227      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
228      <tr><td class="lineno" valign="top"></td><td class="left">3.  Header Field Definitions</td><td> </td><td class="right">3.  Header Field Definitions</td><td class="lineno" valign="top"></td></tr>
229      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
230      <tr><td><a name="diff0015" /></td></tr>
231      <tr><td class="lineno" valign="top"></td><td class="lblock">   This section defines the syntax and semantics of <span class="delete">all standard</span></td><td> </td><td class="rblock">   This section defines the syntax and semantics of HTTP/1.1 header</td><td class="lineno" valign="top"></td></tr>
232      <tr><td class="lineno" valign="top"></td><td class="lblock">   HTTP/1.1 header <span class="delete">fields.  For entity-header fields, both sender and</span></td><td> </td><td class="rblock">   <span class="insert">fields related</span> to <span class="insert">authentication.</span></td><td class="lineno" valign="top"></td></tr>
233      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   recipient refer</span> to <span class="delete">either the client or the server, depending on who</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
234      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   sends and who receives the entity.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
235      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
236      <tr><td class="lineno" valign="top"></td><td class="left">3.1.  Authorization</td><td> </td><td class="right">3.1.  Authorization</td><td class="lineno" valign="top"></td></tr>
237      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
238      <tr><td class="lineno" valign="top"></td><td class="left">   A user agent that wishes to authenticate itself with a server--</td><td> </td><td class="right">   A user agent that wishes to authenticate itself with a server--</td><td class="lineno" valign="top"></td></tr>
239      <tr><td class="lineno" valign="top"></td><td class="left">   usually, but not necessarily, after receiving a 401 response--does so</td><td> </td><td class="right">   usually, but not necessarily, after receiving a 401 response--does so</td><td class="lineno" valign="top"></td></tr>
240      <tr><td class="lineno" valign="top"></td><td class="left">   by including an Authorization request-header field with the request.</td><td> </td><td class="right">   by including an Authorization request-header field with the request.</td><td class="lineno" valign="top"></td></tr>
241      <tr><td class="lineno" valign="top"></td><td class="left">   The Authorization field value consists of credentials containing the</td><td> </td><td class="right">   The Authorization field value consists of credentials containing the</td><td class="lineno" valign="top"></td></tr>
242      <tr><td class="lineno" valign="top"></td><td class="left">   authentication information of the user agent for the realm of the</td><td> </td><td class="right">   authentication information of the user agent for the realm of the</td><td class="lineno" valign="top"></td></tr>
243      <tr><td class="lineno" valign="top"></td><td class="left">   resource being requested.</td><td> </td><td class="right">   resource being requested.</td><td class="lineno" valign="top"></td></tr>
244      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
245      <tr><td class="lineno" valign="top"></td><td class="left">          Authorization  = "Authorization" ":" credentials</td><td> </td><td class="right">          Authorization  = "Authorization" ":" credentials</td><td class="lineno" valign="top"></td></tr>
246      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
247      <tr><td class="lineno" valign="top"></td><td class="left">   HTTP access authentication is described in "HTTP Authentication:</td><td> </td><td class="right">   HTTP access authentication is described in "HTTP Authentication:</td><td class="lineno" valign="top"></td></tr>
248      <tr><td class="lineno" valign="top"></td><td class="left">   Basic and Digest Access Authentication" [RFC2617].  If a request is</td><td> </td><td class="right">   Basic and Digest Access Authentication" [RFC2617].  If a request is</td><td class="lineno" valign="top"></td></tr>
249      <tr><td class="lineno" valign="top"></td><td class="left">   authenticated and a realm specified, the same credentials SHOULD be</td><td> </td><td class="right">   authenticated and a realm specified, the same credentials SHOULD be</td><td class="lineno" valign="top"></td></tr>
250      <tr><td class="lineno" valign="top"></td><td class="left">   valid for all other requests within this realm (assuming that the</td><td> </td><td class="right">   valid for all other requests within this realm (assuming that the</td><td class="lineno" valign="top"></td></tr>
251      <tr><td class="lineno" valign="top"></td><td class="left">   authentication scheme itself does not require otherwise, such as</td><td> </td><td class="right">   authentication scheme itself does not require otherwise, such as</td><td class="lineno" valign="top"></td></tr>
252      <tr><td class="lineno" valign="top"></td><td class="left">   credentials that vary according to a challenge value or using</td><td> </td><td class="right">   credentials that vary according to a challenge value or using</td><td class="lineno" valign="top"></td></tr>
253      <tr><td class="lineno" valign="top"></td><td class="left">   synchronized clocks).</td><td> </td><td class="right">   synchronized clocks).</td><td class="lineno" valign="top"></td></tr>
254      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
255      <tr><td><a name="diff0016" /></td></tr>
256      <tr><td class="lineno" valign="top"></td><td class="lblock">   When a shared cache (see Section <span class="delete">2.7</span> of [Part6]) receives a request</td><td> </td><td class="rblock">   When a shared cache (see Section <span class="insert">8</span> of [Part6]) receives a request</td><td class="lineno" valign="top"></td></tr>
257      <tr><td class="lineno" valign="top"></td><td class="left">   containing an Authorization field, it MUST NOT return the</td><td> </td><td class="right">   containing an Authorization field, it MUST NOT return the</td><td class="lineno" valign="top"></td></tr>
258      <tr><td class="lineno" valign="top"></td><td class="left">   corresponding response as a reply to any other request, unless one of</td><td> </td><td class="right">   corresponding response as a reply to any other request, unless one of</td><td class="lineno" valign="top"></td></tr>
259      <tr><td class="lineno" valign="top"></td><td class="left">   the following specific exceptions holds:</td><td> </td><td class="right">   the following specific exceptions holds:</td><td class="lineno" valign="top"></td></tr>
260      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
261      <tr><td class="lineno" valign="top"></td><td class="left">   1.  If the response includes the "s-maxage" cache-control directive,</td><td> </td><td class="right">   1.  If the response includes the "s-maxage" cache-control directive,</td><td class="lineno" valign="top"></td></tr>
262      <tr><td class="lineno" valign="top"></td><td class="left">       the cache MAY use that response in replying to a subsequent</td><td> </td><td class="right">       the cache MAY use that response in replying to a subsequent</td><td class="lineno" valign="top"></td></tr>
263      <tr><td class="lineno" valign="top"></td><td class="left">       request.  But (if the specified maximum age has passed) a proxy</td><td> </td><td class="right">       request.  But (if the specified maximum age has passed) a proxy</td><td class="lineno" valign="top"></td></tr>
264      <tr><td class="lineno" valign="top"></td><td class="left">       cache MUST first revalidate it with the origin server, using the</td><td> </td><td class="right">       cache MUST first revalidate it with the origin server, using the</td><td class="lineno" valign="top"></td></tr>
265      <tr><td class="lineno" valign="top"></td><td class="left">       request-headers from the new request to allow the origin server</td><td> </td><td class="right">       request-headers from the new request to allow the origin server</td><td class="lineno" valign="top"></td></tr>
266      <tr><td class="lineno" valign="top"></td><td class="left">       to authenticate the new request.  (This is the defined behavior</td><td> </td><td class="right">       to authenticate the new request.  (This is the defined behavior</td><td class="lineno" valign="top"></td></tr>
267      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
268      <tr bgcolor="gray" ><td></td><th><a name="part-l4" /><small>skipping to change at</small><em> page 7, line 30</em></th><th> </th><th><a name="part-r4" /><small>skipping to change at</small><em> page 7, line 46</em></th><td></td></tr>
269      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
270      <tr><td class="lineno" valign="top"></td><td class="left">   This section is meant to inform application developers, information</td><td> </td><td class="right">   This section is meant to inform application developers, information</td><td class="lineno" valign="top"></td></tr>
271      <tr><td class="lineno" valign="top"></td><td class="left">   providers, and users of the security limitations in HTTP/1.1 as</td><td> </td><td class="right">   providers, and users of the security limitations in HTTP/1.1 as</td><td class="lineno" valign="top"></td></tr>
272      <tr><td class="lineno" valign="top"></td><td class="left">   described by this document.  The discussion does not include</td><td> </td><td class="right">   described by this document.  The discussion does not include</td><td class="lineno" valign="top"></td></tr>
273      <tr><td class="lineno" valign="top"></td><td class="left">   definitive solutions to the problems revealed, though it does make</td><td> </td><td class="right">   definitive solutions to the problems revealed, though it does make</td><td class="lineno" valign="top"></td></tr>
274      <tr><td class="lineno" valign="top"></td><td class="left">   some suggestions for reducing security risks.</td><td> </td><td class="right">   some suggestions for reducing security risks.</td><td class="lineno" valign="top"></td></tr>
275      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
276      <tr><td class="lineno" valign="top"></td><td class="left">5.1.  Authentication Credentials and Idle Clients</td><td> </td><td class="right">5.1.  Authentication Credentials and Idle Clients</td><td class="lineno" valign="top"></td></tr>
277      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
278      <tr><td class="lineno" valign="top"></td><td class="left">   Existing HTTP clients and user agents typically retain authentication</td><td> </td><td class="right">   Existing HTTP clients and user agents typically retain authentication</td><td class="lineno" valign="top"></td></tr>
279      <tr><td><a name="diff0017" /></td></tr>
280      <tr><td class="lineno" valign="top"></td><td class="lblock">   information indefinitely.  HTTP/1.1<span class="delete">.</span> does not provide a method for a</td><td> </td><td class="rblock">   information indefinitely.  HTTP/1.1 does not provide a method for a</td><td class="lineno" valign="top"></td></tr>
281      <tr><td class="lineno" valign="top"></td><td class="left">   server to direct clients to discard these cached credentials.  This</td><td> </td><td class="right">   server to direct clients to discard these cached credentials.  This</td><td class="lineno" valign="top"></td></tr>
282      <tr><td class="lineno" valign="top"></td><td class="left">   is a significant defect that requires further extensions to HTTP.</td><td> </td><td class="right">   is a significant defect that requires further extensions to HTTP.</td><td class="lineno" valign="top"></td></tr>
283      <tr><td class="lineno" valign="top"></td><td class="left">   Circumstances under which credential caching can interfere with the</td><td> </td><td class="right">   Circumstances under which credential caching can interfere with the</td><td class="lineno" valign="top"></td></tr>
284      <tr><td class="lineno" valign="top"></td><td class="left">   application's security model include but are not limited to:</td><td> </td><td class="right">   application's security model include but are not limited to:</td><td class="lineno" valign="top"></td></tr>
285      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
286      <tr><td class="lineno" valign="top"></td><td class="left">   o  Clients which have been idle for an extended period following</td><td> </td><td class="right">   o  Clients which have been idle for an extended period following</td><td class="lineno" valign="top"></td></tr>
287      <tr><td class="lineno" valign="top"></td><td class="left">      which the server might wish to cause the client to reprompt the</td><td> </td><td class="right">      which the server might wish to cause the client to reprompt the</td><td class="lineno" valign="top"></td></tr>
288      <tr><td class="lineno" valign="top"></td><td class="left">      user for credentials.</td><td> </td><td class="right">      user for credentials.</td><td class="lineno" valign="top"></td></tr>
289      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
290      <tr><td class="lineno" valign="top"></td><td class="left">   o  Applications which include a session termination indication (such</td><td> </td><td class="right">   o  Applications which include a session termination indication (such</td><td class="lineno" valign="top"></td></tr>
291      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
292      <tr bgcolor="gray" ><td></td><th><a name="part-l5" /><small>skipping to change at</small><em> page 8, line 8</em></th><th> </th><th><a name="part-r5" /><small>skipping to change at</small><em> page 8, line 25</em></th><td></td></tr>
293      <tr><td class="lineno" valign="top"></td><td class="left">   This is currently under separate study.  There are a number of work-</td><td> </td><td class="right">   This is currently under separate study.  There are a number of work-</td><td class="lineno" valign="top"></td></tr>
294      <tr><td class="lineno" valign="top"></td><td class="left">   arounds to parts of this problem, and we encourage the use of</td><td> </td><td class="right">   arounds to parts of this problem, and we encourage the use of</td><td class="lineno" valign="top"></td></tr>
295      <tr><td class="lineno" valign="top"></td><td class="left">   password protection in screen savers, idle time-outs, and other</td><td> </td><td class="right">   password protection in screen savers, idle time-outs, and other</td><td class="lineno" valign="top"></td></tr>
296      <tr><td class="lineno" valign="top"></td><td class="left">   methods which mitigate the security problems inherent in this</td><td> </td><td class="right">   methods which mitigate the security problems inherent in this</td><td class="lineno" valign="top"></td></tr>
297      <tr><td class="lineno" valign="top"></td><td class="left">   problem.  In particular, user agents which cache credentials are</td><td> </td><td class="right">   problem.  In particular, user agents which cache credentials are</td><td class="lineno" valign="top"></td></tr>
298      <tr><td class="lineno" valign="top"></td><td class="left">   encouraged to provide a readily accessible mechanism for discarding</td><td> </td><td class="right">   encouraged to provide a readily accessible mechanism for discarding</td><td class="lineno" valign="top"></td></tr>
299      <tr><td class="lineno" valign="top"></td><td class="left">   cached credentials under user control.</td><td> </td><td class="right">   cached credentials under user control.</td><td class="lineno" valign="top"></td></tr>
300      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
301      <tr><td class="lineno" valign="top"></td><td class="left">6.  Acknowledgments</td><td> </td><td class="right">6.  Acknowledgments</td><td class="lineno" valign="top"></td></tr>
302      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
303      <tr><td><a name="diff0018" /></td></tr>
304      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">Based on an XML translation of RFC 2616 by Julian Reschke</span>.</td><td> </td><td class="rblock">   <span class="insert">TBD</span>.</td><td class="lineno" valign="top"></td></tr>
305      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
306      <tr><td class="lineno" valign="top"></td><td class="left">7.  References</td><td> </td><td class="right">7.  References</td><td class="lineno" valign="top"></td></tr>
307      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
308      <tr><td><a name="diff0019" /></td></tr>
309      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">7.1.  Normative References</span></td><td class="lineno" valign="top"></td></tr>
310      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
311      <tr><td class="lineno" valign="top"></td><td class="left">   [Part6]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td> </td><td class="right">   [Part6]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td class="lineno" valign="top"></td></tr>
312      <tr><td><a name="diff0020" /></td></tr>
313      <tr><td class="lineno" valign="top"></td><td class="lblock">              Masinter, L., Leach, P., <span class="delete">and T.</span> Berners-Lee, "HTTP/1.1,</td><td> </td><td class="rblock">              Masinter, L., Leach, P., Berners-Lee, <span class="insert">T., Lafon, Y., Ed.,</span></td><td class="lineno" valign="top"></td></tr>
314      <tr><td class="lineno" valign="top"></td><td class="lblock">              part 6: Caching", <span class="delete">draft-ietf-httpbis-p6-cache-00</span> (work in</td><td> </td><td class="rblock"><span class="insert">              and J. Reschke, Ed.,</span> "HTTP/1.1, part 6: Caching",</td><td class="lineno" valign="top"></td></tr>
315      <tr><td class="lineno" valign="top"></td><td class="lblock">              progress), <span class="delete">December 2007.</span></td><td> </td><td class="rblock">              <span class="insert">draft-ietf-httpbis-p6-cache-01</span> (work in progress),</td><td class="lineno" valign="top"></td></tr>
316      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">              <span class="insert">January 2008.</span></td><td class="lineno" valign="top"></td></tr>
317      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
318      <tr><td><a name="diff0021" /></td></tr>
319      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">[RFC2616]  Fielding, R., Gettys, J., Mogul, J., Frystyk, H.,</span></td><td> </td><td class="rblock">   <span class="insert">[RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate</span></td><td class="lineno" valign="top"></td></tr>
320      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">              Masinter, L., Leach, P., and T. Berners-Lee, "Hypertext</span></td><td> </td><td class="rblock"><span class="insert">              Requirement Levels", BCP 14,</span> RFC <span class="insert">2119, March 1997.</span></td><td class="lineno" valign="top"></td></tr>
321      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">              Transfer Protocol -- HTTP/1.1",</span> RFC <span class="delete">2616, June 1999.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
322      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
323      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC2617]  Franks, J., Hallam-Baker, P., Hostetler, J., Lawrence, S.,</td><td> </td><td class="right">   [RFC2617]  Franks, J., Hallam-Baker, P., Hostetler, J., Lawrence, S.,</td><td class="lineno" valign="top"></td></tr>
324      <tr><td class="lineno" valign="top"></td><td class="left">              Leach, P., Luotonen, A., and L. Stewart, "HTTP</td><td> </td><td class="right">              Leach, P., Luotonen, A., and L. Stewart, "HTTP</td><td class="lineno" valign="top"></td></tr>
325      <tr><td class="lineno" valign="top"></td><td class="left">              Authentication: Basic and Digest Access Authentication",</td><td> </td><td class="right">              Authentication: Basic and Digest Access Authentication",</td><td class="lineno" valign="top"></td></tr>
326      <tr><td class="lineno" valign="top"></td><td class="left">              RFC 2617, June 1999.</td><td> </td><td class="right">              RFC 2617, June 1999.</td><td class="lineno" valign="top"></td></tr>
327      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
328      <tr><td><a name="diff0022" /></td></tr>
329      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">7.2.  Informative References</span></td><td class="lineno" valign="top"></td></tr>
330      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
331      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   [RFC2616]  Fielding, R., Gettys, J., Mogul, J., Frystyk, H.,</span></td><td class="lineno" valign="top"></td></tr>
332      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">              Masinter, L., Leach, P., and T. Berners-Lee, "Hypertext</span></td><td class="lineno" valign="top"></td></tr>
333      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">              Transfer Protocol -- HTTP/1.1", RFC 2616, June 1999.</span></td><td class="lineno" valign="top"></td></tr>
334      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
335      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">Appendix A.  Compatibility with Previous Versions</span></td><td class="lineno" valign="top"></td></tr>
336      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
337      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">A.1.  Changes from RFC 2616</span></td><td class="lineno" valign="top"></td></tr>
338      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
339      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">Appendix B.  Change Log (to be removed by RFC Editor before publication)</span></td><td class="lineno" valign="top"></td></tr>
340      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
341      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">B.1.  Since RFC2616</span></td><td class="lineno" valign="top"></td></tr>
342      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
343      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Extracted relevant partitions from [RFC2616].</span></td><td class="lineno" valign="top"></td></tr>
344      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
345      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">B.2.  Since draft-ietf-httpbis-p7-auth-00</span></td><td class="lineno" valign="top"></td></tr>
346      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
347      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Closed issues:</span></td><td class="lineno" valign="top"></td></tr>
348      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
349      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  &lt;http://www3.tools.ietf.org/wg/httpbis/trac/ticket/35&gt;: "Normative</span></td><td class="lineno" valign="top"></td></tr>
350      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      and Informative references"</span></td><td class="lineno" valign="top"></td></tr>
351      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
352      <tr><td class="lineno" valign="top"></td><td class="left">Index</td><td> </td><td class="right">Index</td><td class="lineno" valign="top"></td></tr>
353      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
354      <tr><td class="lineno" valign="top"></td><td class="left">   4</td><td> </td><td class="right">   4</td><td class="lineno" valign="top"></td></tr>
355      <tr><td class="lineno" valign="top"></td><td class="left">      401 Unauthorized (status code)  4</td><td> </td><td class="right">      401 Unauthorized (status code)  4</td><td class="lineno" valign="top"></td></tr>
356      <tr><td><a name="diff0023" /></td></tr>
357      <tr><td class="lineno" valign="top"></td><td class="lblock">      407 Proxy Authentication Required (status code)  <span class="delete">4</span></td><td> </td><td class="rblock">      407 Proxy Authentication Required (status code)  <span class="insert">5</span></td><td class="lineno" valign="top"></td></tr>
358      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
359      <tr><td class="lineno" valign="top"></td><td class="left">   A</td><td> </td><td class="right">   A</td><td class="lineno" valign="top"></td></tr>
360      <tr><td class="lineno" valign="top"></td><td class="left">      Authorization header  5</td><td> </td><td class="right">      Authorization header  5</td><td class="lineno" valign="top"></td></tr>
361      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
362      <tr><td class="lineno" valign="top"></td><td class="left">   G</td><td> </td><td class="right">   G</td><td class="lineno" valign="top"></td></tr>
363      <tr><td class="lineno" valign="top"></td><td class="left">      Grammar</td><td> </td><td class="right">      Grammar</td><td class="lineno" valign="top"></td></tr>
364      <tr><td class="lineno" valign="top"></td><td class="left">         Authorization  5</td><td> </td><td class="right">         Authorization  5</td><td class="lineno" valign="top"></td></tr>
365      <tr><td class="lineno" valign="top"></td><td class="left">         Proxy-Authenticate  6</td><td> </td><td class="right">         Proxy-Authenticate  6</td><td class="lineno" valign="top"></td></tr>
366      <tr><td class="lineno" valign="top"></td><td class="left">         Proxy-Authorization  6</td><td> </td><td class="right">         Proxy-Authorization  6</td><td class="lineno" valign="top"></td></tr>
367      <tr><td class="lineno" valign="top"></td><td class="left">         WWW-Authenticate  7</td><td> </td><td class="right">         WWW-Authenticate  7</td><td class="lineno" valign="top"></td></tr>
368      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
369      <tr><td class="lineno" valign="top"></td><td class="left">   H</td><td> </td><td class="right">   H</td><td class="lineno" valign="top"></td></tr>
370      <tr><td class="lineno" valign="top"></td><td class="left">      Headers</td><td> </td><td class="right">      Headers</td><td class="lineno" valign="top"></td></tr>
371      <tr><td class="lineno" valign="top"></td><td class="left">         Authorization  5</td><td> </td><td class="right">         Authorization  5</td><td class="lineno" valign="top"></td></tr>
372      <tr><td class="lineno" valign="top"></td><td class="left">         Proxy-Authenticate  6</td><td> </td><td class="right">         Proxy-Authenticate  6</td><td class="lineno" valign="top"></td></tr>
373      <tr><td class="lineno" valign="top"></td><td class="left">         Proxy-Authorization  6</td><td> </td><td class="right">         Proxy-Authorization  6</td><td class="lineno" valign="top"></td></tr>
374      <tr><td><a name="diff0024" /></td></tr>
375      <tr><td class="lineno" valign="top"></td><td class="lblock">         WWW-Authenticate  <span class="delete">6</span></td><td> </td><td class="rblock">         WWW-Authenticate  <span class="insert">7</span></td><td class="lineno" valign="top"></td></tr>
376      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
377      <tr><td class="lineno" valign="top"></td><td class="left">   P</td><td> </td><td class="right">   P</td><td class="lineno" valign="top"></td></tr>
378      <tr><td class="lineno" valign="top"></td><td class="left">      Proxy-Authenticate header  6</td><td> </td><td class="right">      Proxy-Authenticate header  6</td><td class="lineno" valign="top"></td></tr>
379      <tr><td class="lineno" valign="top"></td><td class="left">      Proxy-Authorization header  6</td><td> </td><td class="right">      Proxy-Authorization header  6</td><td class="lineno" valign="top"></td></tr>
380      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
381      <tr><td class="lineno" valign="top"></td><td class="left">   S</td><td> </td><td class="right">   S</td><td class="lineno" valign="top"></td></tr>
382      <tr><td class="lineno" valign="top"></td><td class="left">      Status Codes</td><td> </td><td class="right">      Status Codes</td><td class="lineno" valign="top"></td></tr>
383      <tr><td class="lineno" valign="top"></td><td class="left">         401 Unauthorized  4</td><td> </td><td class="right">         401 Unauthorized  4</td><td class="lineno" valign="top"></td></tr>
384      <tr><td><a name="diff0025" /></td></tr>
385      <tr><td class="lineno" valign="top"></td><td class="lblock">         407 Proxy Authentication Required  <span class="delete">4</span></td><td> </td><td class="rblock">         407 Proxy Authentication Required  <span class="insert">5</span></td><td class="lineno" valign="top"></td></tr>
386      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
387      <tr><td class="lineno" valign="top"></td><td class="left">   W</td><td> </td><td class="right">   W</td><td class="lineno" valign="top"></td></tr>
388      <tr><td><a name="diff0026" /></td></tr>
389      <tr><td class="lineno" valign="top"></td><td class="lblock">      WWW-Authenticate header  <span class="delete">6</span></td><td> </td><td class="rblock">      WWW-Authenticate header  <span class="insert">7</span></td><td class="lineno" valign="top"></td></tr>
390      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
391      <tr><td class="lineno" valign="top"></td><td class="left">Authors' Addresses</td><td> </td><td class="right">Authors' Addresses</td><td class="lineno" valign="top"></td></tr>
392      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
393      <tr><td class="lineno" valign="top"></td><td class="left">   Roy T. Fielding (editor)</td><td> </td><td class="right">   Roy T. Fielding (editor)</td><td class="lineno" valign="top"></td></tr>
394      <tr><td class="lineno" valign="top"></td><td class="left">   Day Software</td><td> </td><td class="right">   Day Software</td><td class="lineno" valign="top"></td></tr>
395      <tr><td class="lineno" valign="top"></td><td class="left">   23 Corporate Plaza DR, Suite 280</td><td> </td><td class="right">   23 Corporate Plaza DR, Suite 280</td><td class="lineno" valign="top"></td></tr>
396      <tr><td class="lineno" valign="top"></td><td class="left">   Newport Beach, CA  92660</td><td> </td><td class="right">   Newport Beach, CA  92660</td><td class="lineno" valign="top"></td></tr>
397      <tr><td class="lineno" valign="top"></td><td class="left">   USA</td><td> </td><td class="right">   USA</td><td class="lineno" valign="top"></td></tr>
398      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
399      <tr><td class="lineno" valign="top"></td><td class="left">   Phone: +1-949-706-5300</td><td> </td><td class="right">   Phone: +1-949-706-5300</td><td class="lineno" valign="top"></td></tr>
400      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
401      <tr bgcolor="gray" ><td></td><th><a name="part-l6" /><small>skipping to change at</small><em> page 11, line 4</em></th><th> </th><th><a name="part-r6" /><small>skipping to change at</small><em> page 12, line 4</em></th><td></td></tr>
402      <tr><td class="lineno" valign="top"></td><td class="left">   Tim Berners-Lee</td><td> </td><td class="right">   Tim Berners-Lee</td><td class="lineno" valign="top"></td></tr>
403      <tr><td class="lineno" valign="top"></td><td class="left">   World Wide Web Consortium</td><td> </td><td class="right">   World Wide Web Consortium</td><td class="lineno" valign="top"></td></tr>
404      <tr><td class="lineno" valign="top"></td><td class="left">   MIT Computer Science and Artificial Intelligence Laboratory</td><td> </td><td class="right">   MIT Computer Science and Artificial Intelligence Laboratory</td><td class="lineno" valign="top"></td></tr>
405      <tr><td class="lineno" valign="top"></td><td class="left">   The Stata Center, Building 32</td><td> </td><td class="right">   The Stata Center, Building 32</td><td class="lineno" valign="top"></td></tr>
406      <tr><td class="lineno" valign="top"></td><td class="left">   32 Vassar Street</td><td> </td><td class="right">   32 Vassar Street</td><td class="lineno" valign="top"></td></tr>
407      <tr><td class="lineno" valign="top"></td><td class="left">   Cambridge, MA  02139</td><td> </td><td class="right">   Cambridge, MA  02139</td><td class="lineno" valign="top"></td></tr>
408      <tr><td class="lineno" valign="top"></td><td class="left">   USA</td><td> </td><td class="right">   USA</td><td class="lineno" valign="top"></td></tr>
409      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
410      <tr><td class="lineno" valign="top"></td><td class="left">   Email: timbl@w3.org</td><td> </td><td class="right">   Email: timbl@w3.org</td><td class="lineno" valign="top"></td></tr>
411      <tr><td class="lineno" valign="top"></td><td class="left">   URI:   http://www.w3.org/People/Berners-Lee/</td><td> </td><td class="right">   URI:   http://www.w3.org/People/Berners-Lee/</td><td class="lineno" valign="top"></td></tr>
412      <tr><td><a name="diff0027" /></td></tr>
413      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   <span class="insert">Yves Lafon (editor)</span></td><td class="lineno" valign="top"></td></tr>
414      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   World Wide Web Consortium</span></td><td class="lineno" valign="top"></td></tr>
415      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   W3C / ERCIM</span></td><td class="lineno" valign="top"></td></tr>
416      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   2004, rte des Lucioles</span></td><td class="lineno" valign="top"></td></tr>
417      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Sophia-Antipolis, AM  06902</span></td><td class="lineno" valign="top"></td></tr>
418      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   France</span></td><td class="lineno" valign="top"></td></tr>
419      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
420      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Email: ylafon@w3.org</span></td><td class="lineno" valign="top"></td></tr>
421      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   URI:   http://www.raubacapeu.net/people/yves/</span></td><td class="lineno" valign="top"></td></tr>
422      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
423      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Julian F. Reschke (editor)</span></td><td class="lineno" valign="top"></td></tr>
424      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   greenbytes GmbH</span></td><td class="lineno" valign="top"></td></tr>
425      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Hafenweg 16</span></td><td class="lineno" valign="top"></td></tr>
426      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Muenster, NW  48155</span></td><td class="lineno" valign="top"></td></tr>
427      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Germany</span></td><td class="lineno" valign="top"></td></tr>
428      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
429      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Phone: +49 251 2807760</span></td><td class="lineno" valign="top"></td></tr>
430      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Fax:   +49 251 2807761</span></td><td class="lineno" valign="top"></td></tr>
431      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Email: julian.reschke@greenbytes.de</span></td><td class="lineno" valign="top"></td></tr>
432      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   URI:   http://greenbytes.de/tech/webdav/</span></td><td class="lineno" valign="top"></td></tr>
433      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
434      <tr><td class="lineno" valign="top"></td><td class="left">Full Copyright Statement</td><td> </td><td class="right">Full Copyright Statement</td><td class="lineno" valign="top"></td></tr>
435      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
436      <tr><td><a name="diff0028" /></td></tr>
437      <tr><td class="lineno" valign="top"></td><td class="lblock">   Copyright (C) The IETF Trust (200<span class="delete">7</span>).</td><td> </td><td class="rblock">   Copyright (C) The IETF Trust (200<span class="insert">8</span>).</td><td class="lineno" valign="top"></td></tr>
438      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
439      <tr><td class="lineno" valign="top"></td><td class="left">   This document is subject to the rights, licenses and restrictions</td><td> </td><td class="right">   This document is subject to the rights, licenses and restrictions</td><td class="lineno" valign="top"></td></tr>
440      <tr><td class="lineno" valign="top"></td><td class="left">   contained in BCP 78, and except as set forth therein, the authors</td><td> </td><td class="right">   contained in BCP 78, and except as set forth therein, the authors</td><td class="lineno" valign="top"></td></tr>
441      <tr><td class="lineno" valign="top"></td><td class="left">   retain all their rights.</td><td> </td><td class="right">   retain all their rights.</td><td class="lineno" valign="top"></td></tr>
442      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
443      <tr><td class="lineno" valign="top"></td><td class="left">   This document and the information contained herein are provided on an</td><td> </td><td class="right">   This document and the information contained herein are provided on an</td><td class="lineno" valign="top"></td></tr>
444      <tr><td class="lineno" valign="top"></td><td class="left">   "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS</td><td> </td><td class="right">   "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS</td><td class="lineno" valign="top"></td></tr>
445      <tr><td class="lineno" valign="top"></td><td class="left">   OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND</td><td> </td><td class="right">   OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND</td><td class="lineno" valign="top"></td></tr>
446      <tr><td class="lineno" valign="top"></td><td class="left">   THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS</td><td> </td><td class="right">   THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS</td><td class="lineno" valign="top"></td></tr>
447      <tr><td class="lineno" valign="top"></td><td class="left">   OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF</td><td> </td><td class="right">   OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF</td><td class="lineno" valign="top"></td></tr>
448
449     <tr><td></td><td class="left"></td><td> </td><td class="right"></td><td></td></tr>
450     <tr bgcolor="gray"><th colspan="5" align="center"><a name="end">&nbsp;End of changes. 28 change blocks.&nbsp;</a></th></tr>
451     <tr class="stats"><td></td><th><i>50 lines changed or deleted</i></th><th><i> </i></th><th><i>119 lines changed or added</i></th><td></td></tr>
452     <tr><td colspan="5" align="center" class="small"><br/>This html diff was produced by rfcdiff 1.34. The latest version is available from <a href="http://www.tools.ietf.org/tools/rfcdiff/" >http://tools.ietf.org/tools/rfcdiff/</a> </td></tr>
453   </table>
454   </body>
455   </html>
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