DHT-Oriented P2P Distributed Storage Authentication System

Compared with traditional centralized storage technology,P2P-oriented distributed storage technology is provided with the advantages of large capacity,good extensibility,load balance,low cost, and so on.So,it has entirely adapted to the development trend of information society with broad prospects.and can meet people’s growing storage demand.However, as a third party of data storage,P2P storage system is unreliable and vulnerable to some malicious attacks coming from both the external attackers and the internal net nodes.So it has become a hot research topic to ensure the integrity and source-reliability of the data in the P2P storage system.The traditional authenticated data structures can solve the authentication problems in the centralized environment, But it can not be applied to the distributed storage environment directly. The distributed skip list(DASL) and the distributed merkle hash tree(DMT) can solve it to some extent,but they are expensive and have many security limitations. So this paper puts forward a distributed authenticated B+tree(DABT) scheme, based on the research of the existing distributed authentication methods,introduces its design ideas, and provides the implementation of the arithmetic,such as its query path algorithm,data object verify algorithm,data object insert and delete algorithm,etc;and analysis it theoretically.Then this paper puts forward a P2P data authentication module based on DABT, and analysis its safety.At last, this paper applies this module in the P2P storage system, designs and implements a DHT-oriented P2P distributed storage authentication prototype system, ensuring the integrity and authentic of the data stored in the system, tests the performance of the system,and compares it with the DMT scheme. The results indicate that the P2P distributed storage authentication system based on DABT is safe and effective, and has both great theoretical significance and practical value.