OAuth 2.0 Message Authentication Code (MAC) Tokens
Phil Hunt, William Mills, Hannes Tschofenig, Justin P Richer · 2014
This document specifies the HTTP MAC access authentication scheme, an HTTP authentication method using a message authentication code (MAC) algorithm to provide cryptographic verification of portions of HTTP requests. The document also defines an OAuth 2.0 binding for use as an access-token type, as well as an extension attribute to the HTTP Set- Cookie response header field.