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<p>Hi,</p>
<p>We would like to share with you some of our concerns about CIBA
as it may be soon accepted at the end of the current implementer's
draft period :<br>
</p>
<p>- The end-to-end use cases addressed by CIBA are still unclear
for us. We do understand the necessity to have a specification
allowing the retrieval of an OAuth 2.0 access_token in a back
channel mode but we don't have in mind end-to-end use cases that
require the delivery of an id_token in pure back channel mode.
@John,Joerg : Did you have time to think about Use Cases for CIBA
?<br>
</p>
<p>- On a security point of view, we think that we missed something.
With the current specification, it seems to be possible to
register a bad client interested by the polling mode with a
legitimate client's sector_identifier_uri and even redirect_uri.
In this way, the bad client will receive a sub dedicated for the
legitimate client.<br>
</p>
<p>- GSMA is already working on an evolution of CIBA allowing
synchronous responses. In their mind (GSMA), they want to address
use cases in which the OP doesn't authenticate the user. It could
maybe be relevant to include this evolution in the current
specification.<br>
</p>
<p>Thanks for your opinions on these aspects,</p>
<p>Br,</p>
<p>The Orange Team.<br>
</p>
<br>
<div class="moz-signature">-- <br>
<font face="TIMES"><font size="2">
<img src="cid:part1.17867140.DEA3CDB4@orange.com" <br="">
<font color="BLACK">
<br>
<b> MARAIS Charles </b><br>
<b> Orange Labs Lannion</b></font><br>
Tel : +33 (0)2 96 07 24 18 <br>
<a href="mailto:charles.marais@orange.com">charles.marais@orange.com</a><br>
Orange Labs Lannion <br>
2, avenue Pierre Marzin <br>
22307 LANNION Cedex - France
<br>
<br>
<br>
</font></font></div>
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