A Hybrid Blockchain Attendance System Using Off-Chain Storage and On-Chain Verification

Abstract

Attendance management systems play a vital role in academic institutions and businesses, but traditional systems are vulnerable to proxy attendance, centralization, and data tampering. This paper suggests a novel and scalable attendance system based on a hybrid blockchain model, using off-chain storage of attendance records via Interplanetary File System (IPFS) and on-chain verification using Ethereum-based smart contracts. These attendance records are to be stored in off-chain mode. The integrity from the CIA will be assured by using SHA-256 from cryptographic hashes. The scalability is measured and improved with a latency of 2 seconds, throughput of almost 100 transactions per second. The storage reduction in the proposed system is supported up to 90%. This proposed model of attendance tracking system is more transparent, secure and also efficient, making it suitable for the practical use