Research on PoW Protocol Security under Optimized Long Delay Attack

In the blockchain network, communication delay between different nodes is a great threat to distributed ledger consistency of each miner. Blockchain core technology Bitcoin. At present, some research has proven security PoW protocol when number rounds small, but in complex asynchronous networks, insufficient on large. This paper improves proposed main chain record model under and then proposes TOD model, which makes more close actual situation reduces errors caused by establishment analysis process. By comparing differences original it verified that improved higher success rate attack probability mining delayable block increases. Then, long balance this paper, adversary control part computing power within certain limit.