基于噪声加密机制的WSN差分位置隐私保护

Noise Encrypted Based Differential Location Privacy Protection in Wireless Sensors Network

位置隐私对无线传感器网络的生命力和隐蔽性具有重要作用,针对位置隐私保护中存在的隐私安全性与位置信息可用性之间的矛盾问题,提出了一种基于噪声加密机制的无线传感器网络差分位置隐私保护协议。通过极坐标下的差分隐私噪声产生机制,将位置信息加噪过程转变为一个维度,节约了隐私保护预算;通过分簇机制及噪声的加解密还原机制,有效增加了位置可用性,在相同隐私保护强度下使得节点位置平均偏移更小。最后通过与其他差分位置隐私机制对比仿真,验证了本文提出的协议具有更高的节点位置可用性。

Location privacy plays an important role in the vitality and concealment of wireless sensor network(WSN).Towards the fact that there are contradictions between location privacy protection and usability of location information in WSN,a noise encrypted based differential location privacy protection protocol is proposed.There is a differential privacy noise generated mechanism in polar coordinates which can cut privacy protection budget by adding noise only to the radial dimension.By node clustering and noise elimination which is realized by encryption and decryption,the offset of disturbed location reduced in the same privacy protection budget,which gives better usability of nodes’location.At last,a simulation and comparison to other differential privacy location protection protocols is provided,which verifies the nice location information usability of the proposed protocol.