Proof-of-Possession Key Semantics for CBOR Web Tokens (CWTs)
M. Jones, Lüdwig Seitz, Göran Selander, S. Erdtman, H. Tschofenig · 2020
This specification describes how to declare in a JSON Web Token (JWT) that the presenter of the JWT possesses a particular proof-of- possession key and how the recipient can cryptographically confirm proof of possession of the key by the presenter. Being able to prove possession of a key is also sometimes described as the presenter being a holder-of-key.