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RFC 9921: CBOR Object Signing and Encryption (COSE) Header Parameter for Timestamp Tokens as Defined in RFC 3161

In plain English — editorial summary, not part of the RFC

This document defines two CBOR Object Signing and Encryption (COSE) header parameters for incorporating timestamping based on RFC 3161 into COSE message structures (COSE_Sign and COSE_Sign1). This enables the use of established timestamping infrastructure per RFC 3161 in COSE-based protocols.

Document record

Document ID
RFC9921
Published
February 2026
Authors
H. Birkholz; T. Fossati; M. Riechert
Status
PROPOSED STANDARD
Stream
IETF
Area
sec
Pages
21
Also known as
—

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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

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canonical URL: /rfc/9921-cbor-object-signing-and-encryption-cose-header-parameter-for-timestamp-tokens-as