Re: [openpgp] Non-SHA-1 fingerprints in signatures [was: Proposal for a separable ring signature scheme...]

Jon Callas <jon@callas.org> Fri, 14 March 2014 16:40 UTC

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From: Jon Callas <jon@callas.org>
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Date: Fri, 14 Mar 2014 09:40:28 -0700
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To: Peter Pentchev <roam@ringlet.net>
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Subject: Re: [openpgp] Non-SHA-1 fingerprints in signatures [was: Proposal for a separable ring signature scheme...]
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On Mar 14, 2014, at 7:24 AM, Peter Pentchev <roam@ringlet.net> wrote:

> 
> Hm, how exactly would this deal with the existence of multiple signing
> subkeys, all associated with the same master public key?  Your current
> proposal explicitly allows for that, using the key IDs; I guess there
> might be a need to include *both* the fingerprint of the master key
> *and* some kind of identification of the subkey actually used for
> signing.

Well, today, the KeyID is exactly that -- the identifier for a key. You have to backtrack from the signing key to its owner in your key database. There's nothing to stop me from using the same signing key in multiple masters. Despite any distress that may give, it can't be stopped, so we might as well embrace it.

	Jon