A Secure Access Scheme for Internet of Things Devices Based on Blockchain

With the continuous development of the Internet of Things technology, the security of the Internet of Things has attracted more and more attention. Terminal equipment access authentication is an important link to ensure the security of the Internet of Things. The current centralized authentication architecture has risks such as poor scalability, poor flexibility, and single point of failure. In addition, traditional access authentication schemes mainly rely on digital certificates for identity authentication, which has the problems of high communication overhead and cannot adapt to the Internet of Things environment with limited terminal equipment resources. To solve these problems, this paper proposes a distributed secure access scheme for IoT based on blockchain technology.