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Good answer. Do you know of a few such services that provide APIs to automate the process?user129679– user1296792014-06-12 00:11:13 +00:00Commented Jun 12, 2014 at 0:11
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@jt0dd: The EU maintains a Trusted List of Certification Service Providers, which would be a good starting point.Greg Hewgill– Greg Hewgill2014-06-12 00:15:00 +00:00Commented Jun 12, 2014 at 0:15
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I'm still interested in a method that is 100% in-house (no third party), but such a thing is probably not invented yet. For now, I'll have to accept a 3rd party API, I expect.user129679– user1296792014-06-12 00:26:36 +00:00Commented Jun 12, 2014 at 0:26
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1@jt0dd: Well, if you create your own timestamped data with no third party involvement, it's unlikely that anybody else would have a reason to believe you if the validity of your timestamp were called into question. However, distributed methods (such as storing a hash inside a cryptocurrency block) rely on distribution of the information but do not rely on a single (or specific) third party.Greg Hewgill– Greg Hewgill2014-06-12 00:29:24 +00:00Commented Jun 12, 2014 at 0:29
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It would require the private key to be inaccessible by the programmer but still able to sign the data. Possible? I don't know.user129679– user1296792014-06-12 00:47:36 +00:00Commented Jun 12, 2014 at 0:47
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