Research On Location Privacy Protection Algorithm Of WSN Source Based On Line And Angle Phantom Source

As a kind of distributed network,wireless sensor network is widely used in war and life.It is applied in many fields,such as military defense,environmental protection,disaster warning,medical and health,intelligent transportation,smart home and so on.Because wireless sensor networks use wireless communication technology to transmit data,they are vulnerable to attack,which leads to the leakage of sensitive data and seriously affects network security.Therefore,privacy protection of special nodes in wireless sensor networks has been paid more and more attention.Location privacy protection in wireless sensor networks is mainly divided into two aspects:source location privacy protection and base station location privacy protection.Based on the existing wireless sensor privacy protection algorithms,aiming at the existing source node location privacy problem,this paper proposes a source location privacy protection algorithm based on linear directional phantom source and a wireless sensor location privacy algorithm based on angle and network partition.Aiming at the problems of phantom source nodes concentrating near real source nodes and single geographic location of phantom source nodes caused by fixed-length random steps in phantom routing,a source location privacy protection algorithm for wireless sensor networks based on linear oriented phantom sources is proposed.The algorithm guarantees the direction of random steps by dividing the neighbor set into straight lines.The directional random steps can keep the phantom source nodes away from the real source nodes.Secondly,the length of the random step is determined by the random function,and the hop count of the random step is obtained by the random function every time the source node sends the data packet,which makes the random step variable in length and disperses the geographical location of the phantom source node.The simulation results show that,compared with the existing source location privacy protection algorithm,the algorithm can induce attackers to deviate from the real path and increase the security cycle.Even when the source node is close to the base station node,the algorithm can effectively protect the location information of the source node.In order to solve the problems of phantom source node concentrating near the real source node,phantom source node concentrating in some areas,and low security period of existing source location privacy protection algorithms,an angle-based and network partition-based source location privacy protection algorithm for wireless sensor networks is proposed.The algorithm divides the neighbor set by the angle relationship between neighbor nodes.Within the selected set,the neighbor nodes forwarding data packets are selected with the ratio of angle as probability,and the transmission path is dispersed.By using the network partition model,the possible areas of phantom source nodes are predefined,so that the phantom source nodes are far away from the real source nodes and can have geographic diversity.The theoretical analysis shows that the phantom source nodes of the algorithm can avoid the visuaj.area and have the diversity of geographical location,The simulation results show that,compared with the existing source location privacy protection algorithm,the algorithm can induce the attacker to deviate from the real path and increase the security cycle.