基于DHT(distributed Hash table)的分布式检索和路由算法凭借其良好的分布性、自组织性、可扩展性等优点,正成为国际上结构化P2P(peer-to-peer)网络研究和应用的热点.但相对于传统的C/S(client/server)网络,P2P网络的非中心化特点以及网络中节点较强的自治性和动态性,使得节点实施恶意行为的可能性大大增加,这令DHT对节点安全性的要求很难得到满足.本文提出了一种基于多维映射机制的安全DHT协议,该机制通过对标识符进行按组划分,将P2P网络中的节点映射到一个多维空间,并通过设计合理的路由算法,使安全工作定位到相对简单的节点区域内进行.理论分析和实验结果表明,本机制能够简化现有DHT安全机制,有效抑制恶意路由行为,提高资源搜索成功率. Distributed search and routing algorithms based on distributed hash table (DHT) are becoming the research and application of peer-to-peer networks in the world because of their good distribution, self-organization and scalability. However, compared with the traditional C / S (client / server) network, the decentralized nature of P2P networks and the strong autonomy and dynamism of nodes in the network greatly increase the possibility of node malicious actions DHT can hardly meet the requirements of node security.This paper proposes a secure DHT protocol based on multi-dimensional mapping mechanism, which maps the nodes in P2P networks to a multi-dimensional space by dividing the identifiers into groups according to groups By designing a reasonable routing algorithm, the security work is located in a relatively simple node area.Theoretical analysis and experimental results show that this mechanism can simplify the existing DHT security mechanism, effectively suppress malicious routing behavior and improve the success rate of resource search.