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You couldn't do that and have it evolve towards a predetermined value though (unless you make it predictable in a way that any viewer could also predict it).

• sova 9y ago
  Yes you can, you have a hash that is not public and only segments are revealed and verified along the chain. Revealing the whole secret no longer makes it secret
  • AgentME 9y ago
    How would that work? Everything in the blockchain is public. You can't automatically have something be revealed in the blockchain; if that worked, what stops someone from simulating blocks being added to the blockchain and seeing what your contract does? Unless the decryption was somehow linked to the set of the proof-of-works involved, but I don't think anyone yet has an idea of how that could be done. You could later publish a decryption key into the blockchain that the contract uses, but I don't think that's "automatic" in the sense the earlier posts were hoping for.
    • sova 9y ago
      Right, you would need a secret that is never revealed on the blockchain itself, but you could verify that someone had it and posted hashes derived from it periodically on the blockchain.