Certificateless cross-domain authentication key agreement

In the Internet of Things environment, with the diversification of devices and the complexity of application scenarios, cross-domain authentication key agreement has become a key technology to ensure communication security. Traditional identity system and certificateless system have unique advantages in their respective fields, but in the face of cross-domain communication, how to achieve efficient and secure key agreement has become an urgent problem to be solved. This chapter designs a cross-domain authentication key agreement scheme which combines identification system and certificateless system, aiming at improving the security and efficiency of communication between devices in the Internet of Things environment, and providing a solid security guarantee for the wide application of the Internet of Things. Under the eCK model which is the most secure model at present, the certificateless eCK model is improved, and the security of the scheme is proved under the improved model.