An Efficient Key Management Scheme for Secure Sensor Networks

Wireless sensor networks(WSN) are randomly deployed in adversary or dangerous environments so that the security of WSN is extremely important. It is necessary to use encryption system to provide security. However, due to lack of energy and storage, typical key management scheme is not suitable for WSN. We propose an efficient key management scheme for WSN. The main purpose of this scheme is to solve secure communications and key management. It uses pre-deployed hash function to compute communication keys between different kinds of nodes in networks. Therefore, it can decrease the communication cost of dispatching keys. Meanwhile, the key management scheme is based on the theory of combinatorial optimization and provides an approach to maintain security while members have changed in groups.