RFC 9921
CBOR Object Signing and Encryption (COSE) Header Parameter for Timestamp Tokens as Defined in RFC 3161, February 2026
- File formats:

- Also available: XML file for editing
- Status:
- PROPOSED STANDARD
- Authors:
- H. Birkholz
T. Fossati
M. Riechert - Stream:
- IETF
- Source:
- cose (sec)
Cite this RFC: TXT | XML | BibTeX
DOI: https://doi.org/10.17487/RFC9921
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Abstract
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.
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 8729.