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Re: [COSE] Assigning CBOR tags to key structures

Carsten Bormann <cabo@tzi.org> Fri, 07 April 2017 16:14 UTC

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From: Carsten Bormann <cabo@tzi.org>
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Date: Fri, 07 Apr 2017 18:14:12 +0200
Cc: cose <cose@ietf.org>, Jim Schaad <ietf@augustcellars.com>
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To: Renzo Navas <renzoefra@gmail.com>
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Subject: Re: [COSE] Assigning CBOR tags to key structures
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Hi Renzo,

where would you put such a tag?

Starting the encoded CBOR with a tag would amount to a magic number unless the media type already indicates that this is CBOR-encoded.  But then it could indicate that this is a application/cose-key in the first place (Content-Format 101):

https://www.iana.org/assignments/core-parameters/core-parameters.xhtml#content-formats

Grüße, Carsten

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