Cross-Domain Authentication Scheme for IoT Devices Based on BlockChain

With the popularity of Internet of Things (IoT) technology, the scale of IoT is gradually becoming huge and demand-driven to form multi-domain IoT, and the demand for cross-domain access of devices in multi-domain scenarios has greatly increased. Secure cross-domain authentication is an important step in securing multi-domain IoT. The current cross-domain authentication architecture for IoT devices has limitations such as single point of failure, low authentication efficiency, poor scalability and other limitations. To address these problems, this paper designs a blockchain-based cross-domain authentication scheme for IoT terminals, which adopts an authentication architecture based on a combination of blockchain and edge computing technology to eliminate the problems of traditional cross-domain authentication for IoT devices and achieve distributed authentication. Considering that IoT devices have the characteristics of heterogeneity, massiveness, and limited resources, a lightweight and secure certificateless signature scheme is introduced in the cross-domain authentication process, eliminating complex certificate management and key escrow, and achieving secure and efficient cross-domain authentication of IoT terminals.