A Blockchain-Based Self-Sovereign Identity Platform for Decentralized Credential Management

Abstract

With the advent of the digital age, identity management systems must be secure and user-controlled; however, current practices are centralized and prone to security breaches and single points of failure. SovrenID is a blockchain-based decentralized identity platform that enables users to have full ownership and control over their digital credentials. Implemented on the Polygon Mumbai testnet and compliant with W3C Decentralized Identifiers (DID) and Verifiable Credentials (VC) standards [3], [4], the system enables universities to issue trusted digital credentials that are securely stored by users and shared directly with employers without the involvement of third parties. The proposed design addresses the limitations of traditional identity management systems, including privacy breaches, centralized control, and inefficient credential verification. The prototype demonstrates the practical implementation of DID creation, credential issuance, cryptographic verification, and credential revocation using blockchain technology. Experimental evaluation shows that credential verification can be completed in less than 5 seconds, while the system supports 50 concurrent requests, significantly reducing manual verification effort and improving security, integrity, privacy, and interoperability through selective disclosure.