The charter could optionally include evaluating constructs like Embedded 
Signatures

https://www.ietf.org/archive/id/draft-rundgren-cbor-core-10.html#name-embedded-signatures

that exploits deterministically encoded CBOR.

Anders


On 2025-05-23 21:57, The IESG wrote:
The CBOR Object Signing and Encryption (cose) WG in the Security Area of the
IETF is undergoing rechartering. The IESG has not made any determination yet.
The following draft charter was submitted, and is provided for informational
purposes only. Please send your comments to the IESG mailing list
([email protected]) by 2025-06-02.

CBOR Object Signing and Encryption (cose)
-----------------------------------------------------------------------
Current status: Active WG

Chairs:
Ivaylo Petrov <[email protected]>
Michael Jones <[email protected]>

Assigned Area Director:
Paul Wouters <[email protected]>

Security Area Directors:
Paul Wouters <[email protected]>
Deb Cooley <[email protected]>

Mailing list:
Address: [email protected]
To subscribe: https://www.ietf.org/mailman/listinfo/cose
Archive: https://mailarchive.ietf.org/arch/browse/cose/

Group page: https://datatracker.ietf.org/group/cose/

Charter: https://datatracker.ietf.org/doc/charter-ietf-cose/

CBOR Object Signing and Encryption (COSE, RFC 9052) describes how to
create and process signatures, message authentication codes, and
encryption using Concise Binary Object Representation (CBOR, RFC 8949)
for serialization. COSE additionally describes a representation for
cryptographic keys.

COSE has been picked up and is being used both by a number of groups
with which it will coordinate its progress. This includes groups within
the IETF (e.g., ACE, CORE, JOSE, LAMPS, ANIMA, and SUIT) and outside the
IETF (e.g., W3C and FIDO). There are a number of implementations, both
open source and private, now in existence.

The COSE working group handles four types of documents:

1. Documents that describe the use of cryptographic algorithms in COSE.
2. Documents that describe additional attributes for COSE.
3. Documents that define header parameters to be used in COSE objects.
4. Documents that define COSE key representations.

The WG will evaluate, and potentially adopt, documents dealing with algorithms
that would fit the criteria of being IETF consensus algorithms.
Potential candidates would include those algorithms that have been evaluated
by the CFRG and algorithms which have gone through a public review and
evaluation process such as was done for the NIST SHA-3 algorithms.

Key management and binding of keys to identities are out of scope for
the working group. The COSE WG will not innovate in terms of
cryptography. The specification of algorithms in COSE is limited to
those in RFCs, active CFRG or IETF WG documents, or algorithms which
have been positively reviewed by the CFRG.

Milestones:

Jun 2025 - COSE header parameters for RFC 3161-based timestamping into COSE
objects to IESG

Jun 2025 - COSE header parameters for incorporating “COSE Receipts” into
COSE objects to IESG

Jul 2025 - COSE header parameters for COSE objects that carry a payload
that is an output of a hash function on an original payload to IESG

Nov 2025 - A CBOR encoding of the certificate profile to the IESG

Jan 2026 - One or more documents describing the proper use of algorithms.



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