Abstract
Wireless sensor networks (WSNs) are widely devoted to monitoring target. Attackers can detect the source node by hop-by-hop backtracking strategy. Therefore, it is necessary to protect the location privacy of data source nodes. Source location privacy (SLP) plays a crucial role in WSNs security. To ensure the security of source location in WSNs, a multi-path source location privacy protection scheme via proxy node is proposed. Source node initiates restricted flooding and directed routing algorithm keep packets away from the source location, effectively increasing the number of random directed paths. Greedy quantitative routing is the basis of generating vast quantities of relay nodes with diverse geographical locations. The receiving node randomly generates angles to complete equal-hop routing. The sending node continuously selects any near-neighbor node as a participant until the data packet is sent to the spin node. The spin node chooses the adjacent quadrant to complete the variable length equal-hop routing through proxy nodes and forwards the packet to the sink node. Theoretical analysis and simulation experiments show that this scheme provides excellent privacy for the source location.