OAuth 2.0 DPoP for the Implicit Flow

Document Type Expired Internet-Draft (individual)
Authors Michael Jones  , Brian Campbell  , John Bradley 
Last updated 2020-09-10 (latest revision 2020-03-09)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This specification describes a mechanism for sender-constraining OAuth 2.0 tokens via a proof-of-possession mechanism on the application level. This mechanism allows for the detection of replay attacks with access tokens. This specification compliments and builds upon the mechanisms defined in draft-fett-oauth-dpop, in which access tokens are returned from the token endpoint. In particular, this specification extends the Demonstration of Proof-of-Possession at the Application Layer (DPoP) mechanisms to also be usable with the OAuth 2.0 implicit flow, in which access tokens are returned from the authorization endpoint.


Michael Jones (mbj@microsoft.com)
Brian Campbell (brian.d.campbell@gmail.com)
John Bradley (ve7jtb@ve7jtb.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)