关键词: 无线传感器网络, 安全认证, 节点认证, 同余方程, 椭圆曲线加密

Abstract: Concerning the problems of large node memory occupation, complex calculation, low information safety degree, in the legal identity authentication when new node joins in sensor networks, a node authentication mechanism of highly safety degree applicable to the limited memory network was proposed. The mechanism used the password to add the node itself, and one-way Hash function was applied to the password and IDentity (ID) for hashing. Password was involved in the generation of the elliptic curve signature algorithm and authentication scheme of congruence equation was adopted between credible nodes. Each certification stage used mutual authentication mode. The proposed algorithm not only can prevent eavesdropping, replay, injection and so on, but also is able to resist guessing attack, mediation attack, anonymous attack and denial of service attack. The comparison with the existing algorithms show that the proposed scheme can reduce the node original memory occupation of three unit level and can reduce key detection rate.

Key words: Wireless Sensor Network (WSN), safety certification, node authentication, congruence equation, Ellipse Curve Cryptography (ECC)