This meeting is setup to discuss proof-of-possession tokens.

Several documents are relevant to this discussion, including 
https://tools.ietf.org/html/draft-ietf-oauth-pop-architecture-08
https://tools.ietf.org/html/draft-ietf-oauth-signed-http-request-03
https://tools.ietf.org/html/draft-richanna-oauth-http-signature-pop-00
https://tools.ietf.org/html/draft-cavage-http-signatures-12
https://tools.ietf.org/html/rfc8613
https://tools.ietf.org/html/draft-ietf-oauth-pop-key-distribution-07
https://tools.ietf.org/html/rfc7800
https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-33
https://tools.ietf.org/html/draft-ietf-oauth-mtls-17