<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal">A new back-channel OpenID Connect Logout spec has been published at
<a href="http://openid.net/specs/openid-connect-backchannel-1_0.html">http://openid.net/specs/openid-connect-backchannel-1_0.html</a>. This can coexist with or be used instead of the front-channel-based
<a href="http://openid.net/specs/openid-connect-session-1_0.html">Session Management</a> and
<a href="http://openid.net/specs/openid-connect-logout-1_0.html">HTTP-Based Logout</a> specifications.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The abstract for the new specification states:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><i>This specification defines a logout mechanism that uses back-channel communication between the OP and RPs being logged out; this differs from front-channel logout mechanisms, which communicate logout requests
from the OP to RPs via the User Agent.<o:p></o:p></i></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This completes publication of the three planned OpenID Connect logout mechanisms: two that communicate on the front-channel through the User Agent (browser) and this one that communicates on the back-channel, without involving the User
Agent. See <a href="http://openid.net/specs/openid-connect-backchannel-1_0-00.html#Introduction">
the Introduction</a> for a discussion of the upsides and downsides of the different logout approaches. As much as we'd like there to be a single logout solution, both experience and extensive discussions led us to the conclusion that there isn't a feasible
one-size-fits-all approach.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Reviews of the new (and existing!) specifications are welcomed.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks to John Bradley, Pedro Felix, Nat Sakimura, Brian Campbell, and Todd Lainhart for their contributions to the creation of the specification.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> -- Mike<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">P.S. This note was also published at <a href="http://self-issued.info/?p=1452">
http://self-issued.info/?p=1452</a> and as <a href="https://twitter.com/selfissued">
@selfissued</a>.<o:p></o:p></p>
</div>
</body>
</html>