Proof for a creation date

[NdK]

Il 06/12/2016 12:30, Roman Zeyde ha scritto:
> You can also use OpenTimestamps service as described here:
> https://petertodd.org/2016/opentimestamps-announcement
Interesting!

To remain on-topic, I'd like to take the "footnote 3":
-8<--
An interesting nuance to this is someone who has stolen a PGP key could
also create a revocation, and they could backdate it to deny access to
previously created signatures; there’s a lot of interesting design
questions about how to deal with this with random beacons and the like
that are beyond the scope of this blog post
-8<--

That could actually reduce trust in any PGP signature, unless there's a
way to timestamp 'something' that says "as of 'now' this key have not
been revoked". Ideally that attestation should be included with the
signature itself.

BYtE,
 Diego