Blockchain-Based Identity and Access Management System with Single Sign-On (SSO)

With the continuous evolution of blockchain technology, digital identity management is shifting toward decentralized and more secure solutions. This study presents a Blockchain-Based Identity and Access Management System with Single Sign-On (SSO) designed to provide a unified and efficient method for authenticating and managing user access across multiple platforms. The proposed framework combines blockchain smart contracts, the Inter Planetary File System (IPFS), and asymmetric cryptography to enhance user privacy and eliminate the risks associated with centralized data storage A prototype of the system was developed using Solidity and tested on the Ethereum test network (Goerli). Experimental results indicate that the system performs authentication in approximately 1.8 seconds on average, maintaining high reliability and eliminating single points of failure commonly found in conventional SSO systems. Security evaluation further demonstrates strong protection against unauthorized access, replay attacks, and credential tampering, ensuring integrity and trust within the identity management process. The research confirms that blockchain-based identity systems can significantly improve data security, transparency, and access control. The outcomes of this work contribute to building a scalable and reliable model for future digital identity and access management solutions.