Key agreement with authenticated between trusted nodes based on self-issued certificate in WSN

Wireless sensor networks are usually deployed in harsh environment or a hostile environment, vulnerable to various attacks. A key agreement scheme is proposed in order to solving the problem that traditional key system can not withstand attacks from internal node captured. The way of judgment node credibility is to calculate the trust value by establishing node communication behavior reputation model. Trusted neighbors exchange public key certificate by the base station to generate and signed. A new authenticated key agreement is designed based on each other´s Identity information and public key certificates, combined with the elliptic curve cryptosystem. The program can resist the malicious behavior of the internal and external nodes effectively, make network security and survivability enhance significantly compared with other programs, make the network have good scalability, and ensure the key forward security and backward security.