Private Aggregation Scheme based on Erasable Data-hiding in Wireless Sensor Networks

A privacy-preserving aggregation scheme based on the designed erasable data-hiding technique was proposed for sensor networks. With this technique, each sensory data item could be hidden by the sensor node which collects it without data exchange; then, the hidden data is reported to the cluster head; and finally, the aggregation result can be recovered from the hidden data in the cluster head which doesn't have any data used for data-hiding. Extensive analysis shows that the proposed scheme is able to preserve privacy more efficiently while consuming less communication overhead and computational overhead, and also has a good resistance to data loss.