Optimized model analysis of blockchain PoW procotol under long delay attack

Abstract:Proof of work(POW) is one of the most widely used consensus method of bitcoin. In some chains, because of the large number of users, the huge amount of information interaction data, equipment hardware failure or malicious attacks on some nodes may cause communication delay, All of these may engender forks on the blockchain resulting data lose. Therefore, whether the blockchain protocol can achieve sufficient security in the asynchronous network environment with long delay, so how to reduce fork and user's data loss caused by long delay attack are important issue related to blockchain protocol. In this study,we optimized the existing model and proposed TOD to describe the evolution state of the main chain accurately.