Re: Series of minor questions about OpenPGP 4

David Shaw wrote:
> It doesn't actually revoke all of them.  A 0x30 revocation on a 0x1F
> signature revokes (potentially) all of them that are a) from the same
> issuer (or from that issuer's designated revoker), and b) timestamped
> earlier than the revocation.  It cannot revoke ones that come after
> it.
Of course. Sorry for the sloppy wording of my email. This is what I meant.

> Even then there is the possibility of confusion of which signature you
> intend to revoke.  In those cases, you can always specify a particular
> signature to revoke using the Signature Target subpacket in the
> revocation.  Arguably, you could even revoke multiple signatures with
> one revocation by using multiple subpackets.
>
> Not, it should be pointed out, that many (any?) implementations
> support Signature Targets yet.  But the semantics are there.
Thank you, this answers my question. Haven't paid attention to Signature
Targets, because I haven't seen a single one in the wild. But they are, indeed,
truly useful and as such worth implementing as soon as OpenPGP gets used for
serious legal purposes. I might do it myself.

-- 
Daniel

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