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RFC 9995: CBOR Object Signing and Encryption (COSE) Hash Envelope

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

This document defines new CBOR Object Signing and Encryption (COSE) header parameters for signaling a payload as an output of a hash function. This mechanism enables faster validation, as access to the original payload is not required for signature validation. Additionally, hints of the hashed payload's content format and availability are defined, providing references to optional discovery mechanisms that can help to find the original payload content.

Document record

Document ID
RFC9995
Published
July 2026
Authors
O. Steele; S. Lasker; H. Birkholz
Status
PROPOSED STANDARD
Stream
IETF
Area
sec
Pages
8
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canonical URL: /rfc/9995-cbor-object-signing-and-encryption-cose-hash-envelope