A Blockchain-Based Biometric Protection and Authentication Mechanism

The probability of biometric information leakage, the dependability on authentication modules, and the lack of transparency in the management of biometric information are pertinent security flaws in biometric authentication systems. This paper presents a biometric authentication system utilizing blockchain, which provides a distributed mechanism for storing biometric templates and conducting biometric authentication. Data hashing scheme (dHash) is employed for generating biometric image hashes before storing the biometric templates to the blockchain, thereby securing biometric templates and minimizing the risk of leakage. We perform experimental evaluations utilizing the FVC2004 DB1, DB2, DB3, and DB4 data sets on the Hyperledger Fabric platform, and performance is assessed using the Caliper benchmark tool. Evaluation reflects reliable and safe authentication, measuring the average latency and throughput for the creation and authentication of biometric templates. The proposed blockchain-based authentication system will offer high throughput and low latency over a variety of applications.