A Faster, Integrated, and Trusted Certificate Authentication and Issuer Validation System Based on Blockchain

Abstract

The rapid growth of digital education and online recruitment has increased the need for secure and reliable certificate verification systems. Conventional certificate validation methods rely on centralized databases or manual verification processes, which are slow, vulnerable to tampering, and prone to single points of failure. To address these limitations, this study proposes an enhanced blockchain-based framework for certificate authentication and issuer validation that ensures transparency, security, and operational efficiency. The proposed mechanism integrates decentralized blockchain architecture with cryptographic hashing and smart contracts to securely record certificate information in an immutable ledger. Each certificate is transformed into a unique cryptographic hash, which is stored on the blockchain to prevent unauthorized modifications and guarantee data integrity. A consortium-based validation model is introduced in which trusted institutions collectively verify and authorize new certificate issuers through a voting mechanism, strengthening system reliability. In addition, a Bloom Filter-based search optimization technique is incorporated to significantly reduce certificate lookup time during verification requests. This approach minimizes unnecessary blockchain queries, improving overall system performance and scalability. Experimental analysis demonstrates that the proposed architecture reduces verification time, enhances security against fraudulent certificates, and lowers operational costs compared with traditional systems. The developed framework provides a scalable, transparent, and tamper-resistant platform suitable for academic institutions, recruitment agencies, and government organizations requiring trustworthy digital certificate management