关键词: 无线传感器网络, 随机游走, 幻影路由, 源位置保护

Abstract: To the problem of the source location information protection in the sensor network, this paper proposes a protocol called MPRP（Multi Phantom node Routing Protocol based on random walk）. MPRP introduces a visual region which limits random walk to avoid blind walk and save communication overhead. In the configuration phase, selecting phantom nodes which are not in the visual area to ensure that the source node, sink node and the phantom node are not on the same line. In the routing phase, a real phantom who plays the role of confusing attackers node is selected in the nodes of alternative phantoms. MPRP gives a new method of selecting the phantom node which realizes the number of phantom nodes and improves the quality of the phantom nodes. Compared to the existing protocols, MPRP prolongs node security time and improves privacy performance while reducing communication overhead.

Key words: Wireless Sensor Networks（WSN）, random walk, phantom routing, source-location preservation