一种基于多维DHT 空间映射的P2P 安全拓扑方案

Abstract

Distributed search and routing algorithms based on the DHT (distributed Hash table) protocol have attracted considerable attention in structured P2P (peer-to-peer) research as a result of favorable properties such as distribution, self-organization, and high scalability. Compared with a traditional C/S (client/server) network, the probability of peers initiating malicious behavior increases dramatically because of their self-governing and dynamic characteristics, which also make it harder to satisfy the peers’ security required by DHT. In this paper, we propose a new secure DHT protocol based on a multidimensional mapping mechanism. This mechanism maps peers to a multidimensional space by dividing the identifiers into groups. Moreover, a series of secure methods and routing algorithms are provided to achieve secure DHT in smaller spaces. Compared with state-of-the-art approaches, the theoretical analysis and experimental results show that the multidimensional mapping mechanism can effectively improve the average success rate of a resource search by inhibiting malicious behavior.