Authentication and access control are among the vital procedures to build efficient networks. Existing centralized solutions suffer from vulnerabilities to DoS attacks, high maintenance costs, and high computational load. Emerge of Blockchain technology provides unprecedented opportunities to improve existing methods. In this paper, we propose a Blockchainbased access control mechanism for providing access to network resources. Removing the single point of failure, decreasing the computational cost and load, high scalability and immutability, and trustful payment are some of the main advantages of the proposed model. CCS CONCEPTS •