I am studying BitCoin recently.
I noticed a method called CommitCoin for secure timestamping. It requires two transactions to send coins back with the same randomness so that others can compute the private key.
However, isn't it easier to just reveal the private key yourself? The whole point is to prove that at some time in the past, I knew something. If I send some coins to the address and send the coins back, and later reveal my private key and it matches the public key, shouldn't it be enough to prove that?
Thanks in advance.