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

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 transactions, 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.