Research On Localization Algorithm Of Privacy Protection For Wireless Sensor Networks

Wireless sensor network is a kind of network composed by a set of sensors, wireless communication and network technology, which is in charge of information acquisition and processing, configured by hundreds of sensor nodes in the way of Ad-Hoc mode. These sensor nodes are capable of sensing, computing and communication. The technology is widely used in all aspects of health monitoring, data acquisition and hazardous military fields. Privacy protection is essential in the process of obtaining the node position. Location privacy algorithm completes the localization of wireless sensor nodes under the premise of the privacy of data and the safety of node position.The thesis divides the positioning system into two aspects of the transmission of data and the privacy of node, and proposes the corresponding protection scheme. The prototype system is designed to protect privacy by theoretical and experimental analysis. The main work reflects in the following three aspects:1.Based on the study and analysis of existing positioning technology and security algorithm,the protocol of HMAP is proposed based on the mutual authentication protocol. The HMAP protocol adds random number into the interactive process of the gateway, the reference node and the blind node, and transmits the information encrypted by hash function, and updates the key for the next round of information dissemination. Then, the protocol is implemented by the Matlab simulation system. The protocol can resist the replay attack, the Sybil attack, the spoofing attack and so on.2.For the secure privacy of sensor node, the thesis proposes the privacy protection method based on anonymity technology considering the security of source node(reference node) and aggregation node(blind node), and establishes an anonymous group by the CTP(Collection Tree Protocol)convergence tree protocol realizing the communication between anonymous nodes. By the Tossim simulation experiments, this method can effectively resist malicious attacks and achieve the maximize of energy and security.3.The prototype system of location privacy is designed on the basis of 1 and 2. The positioning privacy protection process is tested and verified under the attack environment. The system shows the result of positioning.In summary, this thesis studies the problem of wireless sensor networks localization privacy,and proposes the appropriate privacy protection algorithm for the transmission between the nodes.Finally, a prototype system is designed to protect the privacy of the positioning. The results show that the proposed algorithm can effectively guarantee the safety of localization privacy.