Internet-Draft draft-ietf-cose-cbor-encoded-cert-16.txt is now available. It
is a work item of the CBOR Object Signing and Encryption (COSE) WG of the
IETF.
Title: CBOR Encoded X.509 Certificates (C509 Certificates)
Authors: John Preuß Mattsson
Göran Selander
Shahid Raza
Joel Höglund
Martin Furuhed
Name: draft-ietf-cose-cbor-encoded-cert-16.txt
Pages: 86
Dates: 2026-01-25
Abstract:
This document specifies a CBOR encoding of X.509 certificates. The
resulting certificates are called C509 certificates. The CBOR
encoding supports a large subset of RFC 5280, common certificate
profiles and is extensible.
Two types of C509 certificates are defined. One type is an
invertible CBOR re-encoding of DER encoded X.509 certificates with
the signature field copied from the DER encoding. The other type is
identical except that the signature is over the CBOR encoding instead
of the DER encoding, avoiding the use of ASN.1. Both types of
certificates have the same semantics as X.509 and the same reduced
size compared to X.509.
The document also specifies CBOR encoded data structures for
certificate (signing) requests and certificate request templates, new
COSE headers, as well as a TLS certificate type and a file format for
C509. This document updates RFC 6698; the TLSA selectors registry is
extended to include C509 certificates.
The IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-ietf-cose-cbor-encoded-cert/
There is also an HTML version available at:
https://www.ietf.org/archive/id/draft-ietf-cose-cbor-encoded-cert-16.html
A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-cose-cbor-encoded-cert-16
Internet-Drafts are also available by rsync at:
rsync.ietf.org::internet-drafts
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