The Research Of Location Privacy In Wireless Sensor Networks

With the development of science and technology, human life tends to be more automatic and intelligent. The connection between information and material is growing. WSN (Wireless Sensor Network) appears under these background. Wireless Sensor Networks have the characteristic of perceive, communication and application-oriented, which make many scholars and engineers involve in research. WSN consists of several wireless sensor nodes, which are arranged in monitoring the area to collect the data, and gather information that are available to the user after multi-hop communication. Not only WSNs have the features of perceived, self-organizing and multi-hop communication, as battery-powered microelectronic devices, but also sensor nodes have the features of energy-limited, computing-limited, and storage-limited. These features make the scheme and strategies used in WSN network need special consideration on nodes’ capacity and network resource consumption.Location privacy protection is a branch of WSN security research, which aims at protecting the privacy of node position information in the network, to avoid that the attacker accesses to location information of the node which damages to the functionality or performance of the network. In position-sensitive applications, location privacy protection is particularly important. Such as the military, the war control center arranged the sensor nodes in the battlefield to monitor major location. As we all know, the location of major is very confidential and sensitive, and it is also the key of success. Such as the exploitation of scarce resources, sensor nodes are arranged in mineable areas to locate those resources. As the huge profit of those resources, criminals try their best to get the location information of source node, so as to obtain scarce resources. Meanwhile, because network environment of the WSN is open and wireless signals are likely to be overhearing, location privacy of nodes is under great threat. Thus the study of location privacy protection of nodes in the WSN is necessary.The study of location privacy protection under WSN has made considerable achievements. However, the researchers assigned attackers different constraints. In practice, the attack way and the target of attacks are diversity. This paper makes a thorough inquiry of。diverse attack in the WSN:on the one hand, analyses and design new protection schemes which can simultaneously against diversity attack; on the other hand, ensure location privacy protection security while reducing network consumption. The main work is as follows:1. The actual attacks in WSN are diverse, traffic analysis and packet tracing attack may exist, and the target may be the source node or the sink node. This paper presents a WSN location privacy protection scheme that againsts diverse attack. The scheme provides privacy protection by destroying the packet correlation to resist packet tracing attacks and increasing fake nodes to resist traffic analysis attacks. In order to decrease the overhead of network, we divide fake sinks into two groups, throw redundant packets probability, and use hash instead of encryption.2. The existing position privacy schemes in the WSN may result in the "poor protection" or "over protection ". This paper uses sensor nodes to monitor attacker, and sink node make an assessment of the security level of the network. Different schemes are used in different security levels. This make it possible to avoid poor protection which weak protect scheme leads to, and avoid excessive consumption which over protection scheme leads to.