Privacy protection algorithm based on expected phantom source node in wireless sensor network

For the problem that the existing source-location privacy protection algorithms have lower safety periods, source-location privacy protection algorithm based on expected phantom source node is proposed. With coordinates of source node and sink node, the algorithm establishes an ellipse and selects a node randomly on the ellipse as expected phantom source node which providing direction for phantom source node. By selecting dispersive expected phantom source nodes, transmission paths of adjacent packets are dispersive. Theoretical analysis shows that the algorithm can increase the probability of packet away from source node and sink node during transmission procedure. The experimental results show that the algorithm can enhance safety period.