Privacy and Integrity Preserving Range Queries in Wireless Sensor Networks
A two tiered sensor network architecture, where storage nodes act as an intermediate tier between sensor nodes and sink which is act as a receiver for storing data items and calculating queries. The author proposes beneficial techniques to save power consumption and memory space consumption and buildup efficient query processing. For preserve privacy, they propose a technique named SafeQ. SafeQ is a protocol, which is used to detect misbehavior of attackers. And storage node can perfectly process queries issued from sink and data items sent by sensor nodes without knowing their original values. For preserve integrity, the author proposes two methods namely Merkle hash tree and neighborhood chains. Both are used for verify whether the query result of data items that satisfy the query.