On 03/03/2013 09:30 PM, Craig Ringer wrote: > I've been wondering for a while if anyone's running > a GPG remote timestamping and attestation service, where you can submit > text (or the hash of a binary) to the service by web or email and have > it sign it with a key only it had access to. The timestamp signature > could then be verified by anyone, without relying on the service being > up or even the continued existence of the service, in order to prove > that at a certain time a certain text existed.
Take a look at http://www.itconsult.co.uk/stamper.htm I have no experience with them, but they've been discussed before in this list, if you want to review the archives. You might also be interested in the relevant wikipedia article: https://en.wikipedia.org/wiki/Trusted_timestamping hth, --dkg
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