Blockchain for Secure Identity Management: A Review on Decentralized Authentication Systems

The rise of blockchain technology has revolutionized identity management by introducing decentralized, secure, and user-centric systems. The capacity of blockchain-based identity management solutions to circumvent the drawbacks of conventional centralized approaches is the primary emphasis of this analysis. Here, we take a look at several important ideas like decentralized trustworthy identity (DTI) and self-sovereign identity (SSI), and we see how they improve privacy and security while giving users more powers over their own data. The paper also analyzes the role of cryptographic protocols, verifiable credentials, and decentralized identifiers (DIDs) in strengthening authentication processes. Despite its promise, blockchain-based identity management faces challenges, including scalability, privacy concerns, regulatory compliance, and system complexity. The purpose of this review is to offer a thorough overview of the present state of decentralized identity management by discussing the many approaches, problems, and potential avenues for further study in this area.