In considering how to add DPoP binding into the Identity Assertion JWT
Authorization Grant, we realized the current RFC7523 defines JWT
Authorization Grants as bearer tokens, requiring the use of
`grant_type=urn:ietf:params:oauth:grant-type:jwt-bearer`

https://datatracker.ietf.org/doc/html/rfc7523#section-2.1

This seemingly precludes the use of DPoP since it would no longer be a JWT
bearer token.

To resolve this, I wrote a small draft that defines
`urn:ietf:params:oauth:grant-type:jwt-dpop` and adds DPoP processing rules
on top of RFC7523. You can find the new draft here:

https://datatracker.ietf.org/doc/draft-parecki-oauth-jwt-dpop-grant/

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Aaron Parecki
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