关键词: 无线传感器网络, 椭圆曲线, 安全, 会话密钥, 公钥列表, 命中率

Abstract: For security communication in the limited resources of Wireless Sensor Networks（WSN）, according to the routing algorithm thought and network environment features of deployment, this paper puts forward a key management scheme based on Elliptic Curve Cryptosystem（ECC） and pubic-key list changing dynamically. The nodes realize two regimes to switch by searching public-key list, and the scheme is based on ECC, so safety gets enough assurance. In combination with the advantages of both mechanisms, and having the authentication function of node, the scheme is better in accord with requirements of WSN.

Key words: Wireless Sensor Network（WSN）, elliptic curve, security, session key, public-key list, hit rate