[Openid-specs-mobile-profile] [Openid-specs-fapi] Decoupled flows for OAuth 2

Anders Rundgren anders.rundgren.net at gmail.com
Sat Mar 3 10:31:09 UTC 2018

On 2018-03-01 17:05, Dave Tonge via Openid-specs-fapi wrote:
> Hi all,
> I would be interested in feedback from those on the list around 2 issues that we have with decoupled flows such as CIBA:
> 1. "Session binding", i.e. ensuring it is the same user on the authentication device and the consumption device
> 2. Obtaining an identifier for the user
> For more on issue no.1, please see the attached discussion paper that I've prepared for the OAuth Security Workshop in Italy in a couple of weeks time.

Since you mention QR codes, the following could maybe be of some interest:

It though requires major HW/SW support to happen so I guess NFC in PCs won't really make it (which is kind of odd since "Phones as Tokens" is already used by hundreds of millions of people).


> Issue no.2 is summarised as follows: in redirect-based flows the client doesn't need to know or pass any user identifier to the authorisation server. In decoupled flows, this changes and the client has to pass some identifier to the authorisation server. This is a potential privacy issue and could allow clients to initiate an auth flow without the users consent, potentially tricking a user into granting access.
> I have received some suggestions around using QR codes to provide unique, single-use (possible time-based) identifiers but I would be interested in further discussion on the list about these ideas.
> Thanks
> -- 
> Dave Tonge
> Moneyhub Enterprise <http://www.google.com/url?q=http%3A%2F%2Fmoneyhubenterprise.com%2F&sa=D&sntz=1&usg=AFQjCNGUnR5opJv5S1uZOVg8aISwPKAv3A>
> 10 Temple Back, Bristol, BS1 6FL
> t: +44 (0)117 280 5120
> Moneyhub Enterprise is a trading style of Momentum Financial Technology Limited which is authorised and regulated by the Financial Conduct Authority ("FCA"). Momentum Financial Technology is entered on the Financial Services Register (FRN 561538) at fca.org.uk/register <http://fca.org.uk/register>. Momentum Financial Technology is registered in England & Wales, company registration number 06909772© . Momentum Financial Technology Limited 2016. DISCLAIMER: This email (including any attachments) is subject to copyright, and the information in it is confidential. Use of this email or of any information in it other than by the addressee is unauthorised and unlawful. Whilst reasonable efforts are made to ensure that any attachments are virus-free, it is the recipient's sole responsibility to scan all attachments for viruses. All calls and emails to and from this company may be monitored and recorded for legitimate purposes relating to this company's business. Any opinions 
> expressed in this email (or in any attachments) are those of the author and do not necessarily represent the opinions of Momentum Financial Technology Limited or of any other group company.
> _______________________________________________
> Openid-specs-fapi mailing list
> Openid-specs-fapi at lists.openid.net
> http://lists.openid.net/mailman/listinfo/openid-specs-fapi

More information about the Openid-specs-mobile-profile mailing list