[Openid-specs-mobile-profile] CIBA binding_message

[charles.marais at orange.com]

Hi,

In my point of view, this parameter makes sense only on backchannel 
initiated sepcification (CIBA). For Uses Cases where a user-agent is 
involved, this functionality should be performed by the OP itself (and 
displayed by the OP on the consumption devide) and not transmitted by 
the SP.

So, for me, it should only be present in CIBA and would be used by the 
SP only if a consumtion device is involved (on which the binding_message 
could be displayed).

So clearly, OPTIONAL for me !

Br,

Charles.


Le 29/11/2016 à 11:00, Axel.Nennker at telekom.de a écrit :
> I removed context and put binding_message back in.
> https://bitbucket.org/openid/mobile/commits/7b27654d636a93324c3b556ebe21f2b4d66456b5
> Although the definition from MODRNA Authentication seems questionable in CIBA because CIBA does not really mention the consumption device.
>
> This is the text from MODRNA Authentication:
>
> "				<t hangText="binding_message">
> 				    OPTIONAL. This is a new parameter. An Interlock message to tie the consumption
> 				    device and the authentication device together.
> 				    How to ensure that the message is actually shown on all relevant
> 				    devices is out of the scope of this document.
> 				    Possible values and constraints are specified in
> 				    <xref target="binding_message_details" />.
> 				    Ways to protect the integrity of the binding_message are discussed
> 				    in <xref target="security_considerations" />.
> 				</t>
> "
>
> In the last version of CIBA "context" was REQUIRED while in the version I copied binding_message back from it was OPTIONAL.
> I resurrected binding_message as OPTIONAL.
>
> What do you think about OPTIONAL versus REQUIRED?
>
> // Axel
>
>
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-- 

*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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