关键词: 无线传感器网络, 隐私保护, 数据融合, 椭圆曲线加密, 数据还原

Abstract: With the practical application in wireless sensor networks, data aggregation technique becomes one of the most important research areas. However, Wireless sensor networks are always deployed in remote and hostile environments to transmit sensitive information, in which sensor nodes are apt to encounter some serious leakage of sensitive data in data aggregation. Hence, privacy preservation is becoming an increasingly important issue in security data aggregation for wireless sensor networks. Therefore, the algorithms of privacy security, whichis based on data aggregation in wireless sensor network, are studied. Meanwhile, the privacypreserving data aggregation models are researched. At present, there are two main privacypreserving methods are studied, which are hopbyhop encryption method and endtoend encryption method. In hopbyhop encryption method, the SMART (slicemixed aggregation) algorithm is representative. However, this algorithm destroys the raw data of each sensor node, which make the fusion center couldnt restore the raw data in each sensor node. In endtoend encryption method, ECC (elliptic curve cryptography) based homomorphic encryption algorithms are able to restore the fusion data to some extent. Therefore, a novel privacypreserving data aggregation algorithm (ECCSMART) is proposed, which combines the ECC algorithm and SMART algorithm. The proposed althrithm can restore the sliced data in fusion center, and enhance the security of the wireless sensor networks.

Key words: wireless sensor nerworks, privacypreserving, data aggregation, elliptic curve cryptography, data restore