{"draft":"draft-ietf-cose-tsa-tst-header-parameter-08","doc_id":"RFC9921","title":"CBOR Object Signing and Encryption (COSE) Header Parameter for Timestamp Tokens as Defined in RFC 3161","authors":["H. Birkholz","T. Fossati","M. Riechert"],"format":["HTML","TEXT","PDF","XML"],"page_count":"21","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"CBOR Object Signing and Encryption","abstract":"This document defines two CBOR Object Signing and Encryption (COSE)\r\nheader parameters for incorporating timestamping based on RFC 3161\r\ninto COSE message structures (COSE_Sign and COSE_Sign1). This enables \r\nthe use of established timestamping infrastructure per RFC 3161 in \r\nCOSE-based protocols.","pub_date":"February 2026","keywords":[],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC9921","errata_url":null}