Blockchain Access Control Based on Continuous Trust Evaluation

With the rapid proliferation of the internet and accelerated digital transformation, issues concerning the leakage of personal information and corporate secrets have become increasingly severe. Data privacy protection has thus emerged as a critically important topic. In information systems, access control refers to the regulation of system resource access based on user identity and permissions. Traditional access control models are prone to security vulnerabilities, such as over-provisioning or omission of permissions, and often lack flexibility. Addressing these issues, this paper proposes a blockchain-based access control method driven by continuous trust evaluation. This method integrates node admission control, chain access control, and account behavior analysis modules to collaboratively enable authorization management and trusted control of the blockchain. The continuous trust evaluation system is built on the principles of zero-trust security, relying on identity authentication as the foundation. It evaluates the trustworthiness of access entities and their behaviors, dynamically adjusting authorization policies based on trust levels to establish a dynamically adaptive security closed-loop system. The model enforces identity verification, permission granting, and continuous monitoring for all access requests entering the system. This approach achieves distributed control and management, event traceability and auditing, decentralized governance, and dynamic access control, thereby preventing information leakage and ensuring data security.