Utilizing Policy Machine for Attribute-Based Access Control in Permissioned Blockchain

In recent times, as the number of blockchain use cases continues to grow, methods and technologies utilized by fraudsters continue to become sophisticated. The most notable form of cyber-attack utilizes a security breach in the internal security of blockchain systems, leading to illegal access to application services. A complex system like the blockchain network requires a dynamic, flexible, and scalable access control mechanism. There are numerous research efforts to leverage smart contracts in implementing access control based on blockchain. However, most of these contributions are either focused on blockchain-based access control for an off-chain resource. Other effects implement blockchain-based access control for a specific domain. We present a generic system architecture with a deployment on Hyperledger Fabric using the NIST Next Generation Access Control (NGAC) for deciding access to the protected resources on the blockchain.