[Cryptography] Best Internet crypto clock ?

John Ioannidis ji at tla.org
Wed Oct 1 21:53:30 EDT 2014

On Wed, Oct 1, 2014 at 4:28 PM, Tony Arcieri <bascule at gmail.com> wrote:
> You could take a hash of some content, use that hash as a Bitcoin private
> key, and send the associated public key 1 Satoshi. You could then prove you
> calculated that hash at a given time by looking up the associated public key
> in the block chain.
> Here's something that does just that:
> https://www.btproof.com/
> --
> Tony Arcieri
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The problem was solved a very long time ago by Haber et al:

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