3 ms·
Sure, that was discussed in detail by Jeremy Clark in CommitCoin. http://users.encs.concordia.ca/~clark/papers/2012_fc.pdf http://users.encs.concordia.ca/~clark
by socrates1024 12y ago
Sure, that was discussed in detail by Jeremy Clark in CommitCoin. http://users.encs.concordia.ca/~clark/papers/2012_fc.pdf http://users.encs.concordia.ca/~clark/papers/2012_fc.pdf
and a related scheme implemented by Manuel Araoz http://www.proofofexistence.com/ http://www.proofofexistence.com/
But Permacoin solves a different problem. With timestamping, the 'hash' of your document is in the blockchain but it's up to you to store the doc yourself if you want to reveal it later. In Permacoin, the network is rewarded for storing all the data itself, redundantly.