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RFC 9942: CBOR Object Signing and Encryption (COSE) Receipts

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

CBOR Object Signing and Encryption (COSE) Receipts prove properties of a Verifiable Data Structure (VDS) to a verifier. VDSs and associated Proof Types enable security properties, such as minimal disclosure, transparency, and non-equivocation. Transparency helps maintain trust over time and has been applied to certificates, end-to-end encrypted messaging systems, and supply chain security. This specification enables concise transparency-oriented systems by building on Concise Binary Object Representation (CBOR) and COSE. The extensibility of the approach is demonstrated by providing CBOR encodings for Merkle inclusion and consistency proofs.

Document record

Document ID
RFC9942
Published
June 2026
Authors
O. Steele; H. Birkholz; A. Delignat-Lavaud; C. Fournet
Status
PROPOSED STANDARD
Stream
IETF
Area
sec
Pages
20
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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