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Blockchain-Based Secure Student Data Management System

1. R. Venkateshwarlu, 2. Sagaram Ganesh, 3. Gouroju Ajaykumar, 4. Gundeti Vaishnavi, 5. Chidrala Vyshnavi

Department of Computer Science and Engineering

Jyothishmathi Institute of Technology and Science, Karimnagar, Telangana, India

sagaramganeshgk@gmail.com, ajaykumargouroju123@gmail.com, gundetivaishnavi634@gmail.com, vyshuchidralavyshnavi@gmail.com

Abstract—The integrity, authenticity, and secure dissemination of educational records constitute a foundational requirement for academic institutions, employers, and regulatory bodies. Conventional centralized database architectures for academic record management are susceptible to unauthorized modification, data breaches, single points of failure, and inefficiencies in cross-institutional record sharing. This paper presents a blockchain-enabled framework for the secure storage and controlled sharing of educational records, integrating the Advanced Encryption Standard (AES) for symmetric data encryption, the Practical Byzantine Fault Tolerance (PBFT) algorithm for distributed consensus validation, smart contracts for automated access authorization, the SHA-256 cryptographic hash function for tamper detection, and cloud-based encrypted storage for scalable data persistence. The proposed system encrypts student records prior to cloud storage, anchors cryptographic hashes on an immutable blockchain ledger, and enforces access control through smart contract logic. The PBFT consensus mechanism ensures transactional integrity with deterministic finality. A formal architectural analysis demonstrates that the system satisfies confidentiality, integrity, non-repudiation, and availability.

Index Terms—Blockchain, Educational Records Management, AES Encryption, PBFT Consensus, Smart Contracts, SHA-256, Data Masking, Cryptographic Hashing, Secure Cloud Storage