Certichain-Blockchain-Based Digital Certificate Verification System

The increasing reliance on digital certificates in education, recruitment, and professional credentialing has led to serious concerns regarding certificate forgery, data manipulation, and inefficient verification processes.Traditional certificate verification systems are centralized and often require manual validation, resulting in delays and security vulnerabilities.To overcome these limitations, this paper presents CertiChain, a blockchain-based digital certificate verification system that ensures authenticity, integrity, and transparency.CertiChain uses cryptographic hash functions and smart contracts to issue and verify certificates on a decentralized blockchain network.Once issued, the certificate hash is stored immutably on the blockchain, making any form of tampering easily detectable.The proposed system eliminates the need for third-party intermediaries and enables instant verification by employers or institutions.Experimental evaluation shows that CertiChain significantly reduces verification time while enhancing security and trust.The system is suitable for real-world adoption in academic institutions, corporate organizations, and government sectors.