Abstract: In two-tiered wireless sensor networks,storage node is an intermediate hode between sensor nodes and Sink nodes,which is responsible for collecting data of sensor nodes and the query of the Sink,so it is more easily attacked by the attacker.Storage nodes can not only reveal the compromise data of sensor nodes,but also is likely to return an incomplete or false results to Sink.To this end,this paper proposed a privacy and integrity protection range query method PIRQ.The PIRQ separates data query and upload process,and uses the R-D sensory data process to change the process of size comparison of the size of the lower and upper bounds on the range of the sensing data and the median into the distance between the perceptual data and the median of the query range and the size of the range of the query,which reduces the energy overhead.0-1 coding and Hash message authentication mechanism are used for data privacy protection,and encrypted data link technology is used for data integrity verification.Theoretical analysis and experimental results show that the method can realize the privacy and integrality of the data,and have higher efficiency of energy consumption.

Key words: Two-tiered wireless sensor networks,Range query,Privacy protection,Integrity checking,0-1 encoding,Encrypted data link technology