Pseudo-Biometric Identity Framework: Achieving Self-Sovereignity for Biometrics on Blockchain

Abstract

Most authentication schemes are centralized or managed by large federated giants. Often data stored in such third parties is highly susceptible to hacks, leaks, cross-matching, selling, and various privacy-invading attacks. Biometric credentials are extremely sensitive as unlike other credentials they cannot be renewed if compromised. This work proposes a blockchain based framework that allows secure, transparent, and privacy-preserving biometric authentication. Instead of storing biometric data in a centralized database they are decentralized and managed using DID and DID documents. It allows a user to posses self-sovereign and revocable pseudo-biometric identities that enables complete control over its biometric identity information, completely anonymous trans-actions, and the right to be forgotten. The pseudo-biometric acts extra protecting by imparting one-way transforms to original biometric and making is absolutely safe to onboard. The scheme is analyzed for performance under various operating scenarios. © 2021 IEEE.