Abstract: Considering the problem of inadequate security in wireless sensor networks, the paper proposed a key agreement scheme based on bilinear pairing for wireless sensor network. Firstly, the proposed scheme pre-distributed network system parameters using ID-based encryption algorithm and computed nodes' parameters on bilinear pairings. Then it broadcasted to networks and exchanged parameters between nodes and computed nodes' key using DifficHellman key exchange technology. Analysis results show that the proposed scheme is not only more efficient than the previous LZC scheme and Shim-Woo scheme, but also satisfies all the required security attributes; implicit key authentication, knownkey security,perfect forward secrecy,key-compromise impersonation resilience and unknown key-share resilience.

Key words: Key agreement, Bilinear pairing, Key exchange, Key management