Passive RFID-supported source location privacy preservation against global eavesdroppers in WSN

Source location privacy is one of the most challenging issues in WSN applications. Some of existing solutions defend the leakage of location information from a limited local adversary who can only observe network traffic in small region, while the global adversary can monitor the entire network traffic. Meanwhile, most of the previous works ignore the categories of RFID. In this paper, we propose a scheme named General Fake Source (GFS) against a global adversary. It supports the passive RFID, which has no battery, cannot send a signal actively. Through simulations, we show that GFS well unifies the behavior of real and fake data sources and provides trade-offs between privacy and energy consume for source location privacy in WSN.