Security optimization method of key exchange protocol for massive Internet of things terminal equipment

There are different access processes of multiple terminal devices in the Internet of things, which are interfered by a large number of identity differentiated authentication behaviors. Under this interference, the security of the device key exchange protocol is greatly reduced. A security optimization method of key exchange protocol for massive Internet of things terminal equipment is proposed. Aiming at the authentication process of Internet of things terminal equipment, a key exchange protocol framework is established. The man in the middle attack mode in the main mode exchange process is deeply analyzed to optimize the security of the exchange protocol. Under the condition of mutual authentication, a new identity authentication method for terminal equipment is designed, and a security optimization scheme is generated combined with elliptic curve algorithm. The experimental results show that after the security optimization application of the key exchange protocol of the Internet of things terminal equipment, the security module length of the key exchange protocol is reduced by 81% and 68%, and the anti attack ability of the multi device exchange protocol of the Internet of things is effectively improved.