Design and Implementation of a Blockchain-based User Access Control Model

User access control systems are essential components across various applications and websites, providing operational managers the ability to control user access to information. However, as the number of users grows, using a single management center no longer meets the demands of massive user access requests. Blockchain technology, characterized by decentralization and immutability, shows immense potential in user access management. Ad-dressing the limited processing speed and inadequate security of single management centers, this paper introduces a blockchain-based user access control model. It designs a blockchain structure with designated servers as nodes, explores attribute-based access control mechanisms, and develops processing mechanisms for different requests. The paper also simulates massive user requests, tests the performance of the proposed architecture under scenarios of massive requests, and compares it with other access control models. The results demonstrate that the proposed user access control model achieves superior performance in scenarios with massive requests compared to other models.