[OAUTH-WG] OAuth Security Topics -- Recommend authorization code instead of implicit

[Hannes Tschofenig <[e-mail]>]

Hi all,

The authors of the OAuth Security Topics draft came to the conclusion that it is not possible to adequately secure the implicit flow against token injection since potential solutions like token binding or JARM are in an early stage of adoption. For this reason, and since CORS allows browser-based apps to send requests to the token endpoint, Torsten suggested to use the authorization code instead of the implicit grant in call cases in his presentation (see https://datatracker.ietf.org/meeting/103/materials/slides-103-oauth-sessb-draft-ietf-oauth-security-topics-01).

A hum in the room at IETF#103 concluded strong support for his recommendations. We would like to confirm the discussion on the list.

Please provide a response by December 3rd.

Ciao

Hannes & Rifaat

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