> Also, I could be wrong, but it looks like the example code will accept longer peer chains even if they're completely different. I think there is a problem wi

> Also, I could be wrong, but it looks like the example code will accept longer peer chains even if they're completely different. I think there is a problem with his proof-of-work algorithm in that his proof of work is not tied to the transactions in the blockchain. Should't it include the hash of the previous block or something, in order to prevent people from simply building a new blockchain while re-using the proofs of work?