GNotary is a set of Python scripts that implement an asynchronous
digital notary service. Anybody who needs certification of any digital
document creates a message digest (like MD5 or RIPEMD160) of that
document and submits it to the GNotary service by email. GNotary signs
this email digitally (using GnuPG), retains a copy of the certified and
time stamped message, and mails it back to the sender, optionally
with the public key attached to allow the sender to verify the signed
document. At regular intervals, the GNotary server creates message
digests of its own logs and distributes them among other GNotary
servers, thus making it virtually impossible to forge the chain of
evidence that authenticates a submitted document.
