Doesn't the bitcoin blockchain provide the same service roughtime does, and without the centralized authority (cloudflare in this case) problem?<p>As in : hash your doc, create a TX with that hash somewhere in it, sending money to yourself, and once the TX is on chain, the block hash is your timestamp.<p>The downside are the fees, and the 10mn delay, of course.<p>[edit]: now that I'm reading about roughtime, I see that the intent is completely different (secure clock sync). However, if the plan is to use roughtime for notarization of documents, I think my remark stands.<p>source: <a href="https://blog.cloudflare.com/roughtime/" rel="nofollow">https://blog.cloudflare.com/roughtime/</a>
I was working on something similar to add in to Perkeep. Any reason you decided not to use Google's Go implementation? <a href="https://roughtime.googlesource.com/roughtime/+/master/go/protocol/" rel="nofollow">https://roughtime.googlesource.com/roughtime/+/master/go/pro...</a>
I love cryptographic/data notaries, I'm glad other people think about them. Thanks for the PoC!<p>I thought I invented them when I sketched this PoC a long time ago:<p><a href="https://github.com/Miserlou/CitizenMediaNotary" rel="nofollow">https://github.com/Miserlou/CitizenMediaNotary</a><p>but blockchains blew up since then and made my design irrelevant.