ietf-openpgp
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Re: Back-signatures, part II

2003-10-28 22:02:46

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On Tue, Oct 28, 2003 at 10:34:17PM -0500, Michael Young wrote:

I don't feel all that strongly about this -- in fact, I don't
consider the problem all that serious in the first place -- but
I do find the properties of the cross-signature subpacket
solution more attractive.

I think I do as well.  I like that it handles old signatures, and I'm
not yet convinced that the include-the-fingerprint covers all of the
attacks that the back-signature does.

Also, note that the specification already provides a "signer userId"
subpacket that could be used to nearly the same effect as a "signer
primary fingerprint" subpacket.  As I recall, the very first proposal
was to recommend/require the use of the existing "signer userId"
subpacket.

Nearly the same effect, yes, but ultimately a different problem.

David
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