关键词: 位置隐私保护, 对等通信, 匿名组, 缓存机制, 恶意攻击

Abstract: Aiming at the shortage of the current methods, a location privacy-preserving method against attacks under P2P communication is proposed. The method builds anonymous group instead of anonymous area to ensure location k-anonymity through user’s collaboration. The introduction of speed makes that group members are not limited to the surrounding in the construction of anonymous group into the process of constructing. Group members keep fuzzy connectivity to resist malicious attacks. Through cache mechanism, anonymous group is reusable to resist multi-query attack and reduce overhead. The experimental results show that the method can achieve highly success rate of k-anonymity, resist those attacks and reduce the system overhead.

Key words: location privacy-preserving, P2P communication, anonymous group, cache mechanism, malicious attack