CommitmentAPI HashPointers AnonymousIdentity CryptoAdd Scrooge-Coin

But the Scrooge-Coin doesn’t solve the “centralization” problem: What if Scrooge is dis-trustful?

Q2BitCoin Bitcoint-Consensus

The Random is not actually how it is working in bitcoin, the node to broadcast its block is the one who solved the puzzle.

Double-spend

Bob wait for 6 nodes confirming the blocks he is intestered in and then complete the transaction.

Proof-of-work parameterizable-cost 51-attack