Research On Key Pre-distribution Scheme In Wireless Sensor Network

With the development of information technologies, it is possible to integrate the computing, communication, networking and sensing into one tiny embedded device. Wireless sensor networks (WSN) is a new research area embedded of those technologies. Integrated with sensor unit, data processor unit and communication module, tiny sensor nodes can work to form a self-organization network, to sample the environment data or monitor the environment. The research of the wireless sensor network gradually gets the focus from the industrial and academe. It has a great application future in the military and civil area.This paper has a deep research on the key pre-distribution of WSN. Based on the analyses of key pre-distribution problem research progress and priorities, this thesis researches a key pre-distribution scheme: using CDMA communication mechanism.In order to achieve secure communication between nodes in wireless sensor networks, the messages between nodes must be encrypted before sent. Nodes can be close to predict target point when special deployment knowledge is used, and can also be grouped by the geography knowledge. So keys can be distributed to nodes in the same group and neighbor groups according to the location information. Key pre- distribution using cell model will provide high efficiency in key distribution and sharing, and will also reduce the cost of distribution and maintenance. This scheme can substantially improve the networks'security and connectivity.