Sensor network-oriented approximate query method commonly used for privacy protection
A sensor network, privacy protection technology, applied in the field of sensor network query, general approximate query, to achieve the effect of reducing energy consumption
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[0034] The basic idea of the privacy-preserving general approximate query method (referred to as the PGAQ method) provided by the present invention is to hide information such as the sensor node number and the sensory data collected by it in the constructed random vector by designing the data structure shared by the base station and the sensor node . The intermediate aggregation node transmits the vector to the base station through tree routing, and performs summation and aggregation in the network during the process of uploading the vector to reduce energy consumption. Construct a linear equation system at the base station, and solve the histogram with global statistical information and the corresponding sensor node numbers. According to the statistical information of the histogram, approximate queries such as Top-k query, range query, SUM, MAX / MIN, Median, and Histogram can be completed without revealing privacy. In the above PGAQ method, the intra-network summation aggre...
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