{
  "draft": "draft-ietf-cose-merkle-tree-proofs-18",
  "doc_id": "RFC9942",
  "title": "CBOR Object Signing and Encryption (COSE) Receipts",
  "authors": [
    "O. Steele",
    "H. Birkholz",
    "A. Delignat-Lavaud",
    "C. Fournet"
  ],
  "format": [
    "XML",
    "TEXT",
    "HTML",
    "PDF"
  ],
  "page_count": "20",
  "pub_status": "PROPOSED STANDARD",
  "status": "PROPOSED STANDARD",
  "source": "CBOR Object Signing and Encryption",
  "abstract": "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.",
  "pub_date": "June 2026",
  "keywords": [
    "COSE"
  ],
  "obsoletes": [],
  "obsoleted_by": [],
  "updates": [],
  "updated_by": [],
  "see_also": [],
  "doi": "10.17487/RFC9942",
  "errata_url": null
}