[Openid-specs-mobile-profile] Comments about CIBA Draft

charles.marais at orange.com charles.marais at orange.com
Wed Apr 19 08:49:21 UTC 2017


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 :

- 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 ?

- 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.

- 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.

Thanks for your opinions on these aspects,


The Orange Team.


*MARAIS Charles *
*Orange Labs Lannion*
Tel : +33 (0)2 96 07 24 18
charles.marais at orange.com <mailto:charles.marais at orange.com>
Orange Labs Lannion
2, avenue Pierre Marzin
22307 LANNION Cedex - France


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