On Sun, 20 Apr 2008 12:27:42 GMT, Jay Maynard
wrote:

On 2008-04-20, Peter Clark wrote:
It's a PGP signature. If you have a PGP decoder and download his
public key it's used to prove the message came from who it says it did
since nobody else's private key will encrypt to the appropriate string
above.

Except for one minor detail: since the guy hides behind an anonymizer,
there's no information gained from the fact that the message passes the
signature test, since all it proves is that the same anonymous coward posted
each one.

Yea, but it does prove it's the SAME person, not a different person
using the same public anonymizer to imitate them. That's what a PGP
sig is for. It's not for validating content of the posts, just the
origin.