关键词: 无线传感器网络, 源位置保护, 假路径, 安全时间

Abstract: To prevent an attacker from performing hop-by-hop traceback to locate source sensor nodes，this paper proposes a strategy called BFP.BFP uses some special messages to activate fake paths crossed with the shortest path.These fake paths may tempt the attacker in a direction farther from the shortest path to increase the attacker’s time to locate source node.In BFP，real messages are routed along the shortest path，thus promising least latency.Theoretical analysis and simulation study show that，comparing with CEM，BFP can enhance safety period by approximately 60% while maintaining equal energy overhead.

Key words: Wireless Sensor Network（WSN）, source-location privacy, fake paths, safety period