Interesting, let me add that you should let people convince you it won't work without proof, especially for something as reliant on behavior! I think a reputat

Interesting, let me add that you should let people convince you it won't work without proof, especially for something as reliant on behavior! I think a reputation system could be built using some kind of peer-to-peer trust system. For example, I'm aware you can prove a certain transaction is yours. Simply by collecting a series of transactions conducted with the merchant and with a series of merchant's trusted peers, the merchant could perhaps decide on the (k1,k2) he might propose; and similarly users may assemble a database of verifiable cases where the transaction backfired (since each user can prove the transaction and the merchant address). It just bugs me -- one of the great promises of crypto currencies is the elimination of need of trusted 3rd parties -- only to be unable to perform useful real world transactions without them. The key to enabling this would be devising a system for voluntary transparency, I believe.