A Source-Location Privacy Protocol in WSN Based on Locational Angle

In environments where sensor networks are used to monitor sensitive objects or valuable assets, attackers may use the method of hop-by-hop backtracking to find out the protected objects. This paper proposes a new source protected protocol in WSN, the phantom routing with locational angle (PRLA). In PRLA, inclination angles are introduced and used to direct random walks, which avoids choosing paths harmful to the privacy of source location. Simulation results show that, compared to the phantom single-path routing protocol proposed in the literature, PRLA improves the safety period by up to 50% with minor increase in energy overhead.