The roughtime protocol gives a secure timestamp right now. Can it be used as a timestamp authority, to sign a document and later prove that it existed before a certain time?
Can roughtime be used as a timestamp authority?
94 views Asked by joeforker At
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The simplest way would be to just use a cryptographic hash of your file as a nounce in your request to the roughtime servers.
Somebody apparently even implemented a proof of concept, including a more sophisticated method.