Subject: Re: [COSE] New Version Notification for draft-mattsson-cose-cbor-cert-compress-03.txt

From: John Mattsson <[email-masked]>
Date: Sun, 15 Nov 2020 22:53:22 +0000

Hi,

I just submitted -03 draft-mattsson-cose-cbor-cert-compress-03.

The changes has already been sent out earlier. Two new changes are:

- "L = ceil( log2(n) / 8 ), where n is the size of the largest prime-order subgroup"
  Thanks for a quick answer Rene!

- Added CBOR encoding of DER certificates that already use point compression. My understanding is that is not commonly used, but maybe it will be in the future.

Cheers,
John

-----Original Message-----
From: "[email-masked]" <[email-masked]>
Date: Sunday, 15 November 2020 at 23:40
To: Shahid Raza <[email-masked]>, John Mattsson <[email-masked]>, John Mattsson <[email-masked]>, Martin Furuhed <[email-masked]>, Joel Hoglund <[email-masked]>, Göran Selander <[email-masked]>, Göran Selander <[email-masked]>, Joel Höglund <[email-masked]>
Subject: New Version Notification for draft-mattsson-cose-cbor-cert-compress-03.txt

A new version of I-D, draft-mattsson-cose-cbor-cert-compress-03.txt
has been successfully submitted by =?utf-8?q?John_Preu=C3=9F_Mattsson?= and posted to the
IETF repository.

Name:		draft-mattsson-cose-cbor-cert-compress
Revision:	03
Title:		CBOR Encoding of X.509 Certificates (CBOR Certificates)
Document date:	2020-11-15
Group:		Individual Submission
Pages:		27
URL:            https://www.ietf.org/archive/id/draft-mattsson-cose-cbor-cert-compress-03.txt
Status:         https://datatracker.ietf.org/doc/draft-mattsson-cose-cbor-cert-compress/
Htmlized:       https://datatracker.ietf.org/doc/html/draft-mattsson-cose-cbor-cert-compress
Htmlized:       https://tools.ietf.org/html/draft-mattsson-cose-cbor-cert-compress-03
Diff:           https://www.ietf.org/rfcdiff?url2=draft-mattsson-cose-cbor-cert-compress-03

Abstract:
   This document specifies a CBOR encoding of PKIX profiled X.509
   Certificates.  The resulting certificates are called "CBOR
   certificates".  The CBOR encoding supports a large subset of RFC
   5280, while at the same time producing very small sizes for
   certificates compatible with RFC 7925.  The CBOR encoding can be used
   to compress DER encoded X.509 certificated to encode natively signed
   certificated.  When uses to compress DER encoded X.509 certificates,
   the CBOR encoding can in many cases compress RFC 7925 profiled
   certificates with over 50%. The document also specifies COSE headers
   for CBOR certificates as well as a TLS certificate type for CBOR
   certificates.

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