Abstract: In the contemporary digital landscape, the proliferation of fake certificates has emerged as a significant threat to the credibility and integrity of educational institutions, corporations, and government entities. The rise of sophisticated forgery techniques has further exacerbated the problem, rendering traditional verification methods ineffective and prone to manipulation. The present study addresses this critical issue by proposing a Blockchain-Based Certificate Verification and Issuer Validation System. This system leverages the decentralised, immutable, and transparent characteristics of blockchain technology to establish a secure and tamper-proof platform for issuing and verifying certificates.
The proposed system is developed using a combination of Ethereum blockchain, smart contracts, Python (Flask), Ganache for blockchain simulation, and MySQL for database management. The key feature of this system is the issuance of certificates as digital records, where each certificate is assigned a cryptographic hash that serves as a unique identifier. This hash, along with essential metadata, is stored on the blockchain, ensuring the authenticity and integrity of the document. Once a certificate is issued, it becomes a permanent, unalterable record on the blockchain, accessible to verifiers through the web interface.

| DOI: 10.17148/IARJSET.2025.125191