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Re: [COSE] "CBOR Certificates"

John Mattsson <john.mattsson@ericsson.com> Sat, 13 February 2021 17:00 UTC

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From: John Mattsson <john.mattsson@ericsson.com>
To: Michael Richardson <mcr+ietf@sandelman.ca>, Carsten Bormann <cabo@tzi.org>, "cose@ietf.org" <cose@ietf.org>
CC: Göran Selander <goran.selander@ericsson.com>
Thread-Topic: [COSE] "CBOR Certificates"
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Date: Sat, 13 Feb 2021 17:00:51 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/cose/DUIiC6KVZQGf6JdCpd5M5_MFZ1Q>
Subject: Re: [COSE] "CBOR Certificates"
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Hi,

I think it is good to have a discussion regarding the name and terminology.

I think “CBOR encoded X.509 Certificates” with some suitable abbreviation would fit both type 0 and 1. Both use CBOR for encoding and both follow RFC 5280 (X.509) except when it comes to DER encoding. As long as the DER<->CBOR encoding is one-to-one it is easy to see that the security of type 0 and type 1 are equal.

I am not against changing the term “CBOR certificate” and saving that for something else that has nothing with RFC 5280 to do, but I do not understand the previous comment to move type 0 to another document. Given a specification of type 1, type 0 follows trivially.

/John

-----Original Message-----
From: COSE <cose-bounces@ietf.org> on behalf of Michael Richardson <mcr+ietf@sandelman.ca>
Date: Saturday, 13 February 2021 at 04:42
To: Carsten Bormann <cabo@tzi.org>, "cose@ietf.org" <cose@ietf.org>
Cc: Göran Selander <goran.selander@ericsson.com>
Subject: Re: [COSE] "CBOR Certificates"


Carsten Bormann <cabo@tzi.org> wrote:
    > On 12. Feb 2021, at 19:59, Michael Richardson <mcr+ietf@sandelman.ca>
    > wrote:
    >>
    >> compressed

    > But they aren’t compressed.

abridged then.

--
Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 IøT consulting )
           Sandelman Software Works Inc, Ottawa and Worldwide

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