Decentralized Voting System Using Blockchain with Biometric and Iris Authentication

Abstract

The Decentralized Blockchain Voting System is a secure, transparent, and tamper-proof digital voting platform developed using Python Django and blockchain technology. It integrates Aadhaar-based authentication with email OTP to ensure voter eligibility and enforce one person, one vote. Votes are immutably recorded on blockchain through cryptographic hashing, eliminating manipulation and enabling real-time verification. The system provides a mobile-friendly interface for authentication, candidate selection, and secure vote casting with instant blockchain confirmation. Administrators can manage elections, monitor statistics, and audit trails using blockchain-backed records. Security is reinforced through encrypted data storage, secure sessions, and CSRF protection. Designed as an educational prototype, this work demonstrates how blockchain and biometrics can enhance trust, accessibility, and accountability in democratic processes, while offering a foundation for future extensions such as multi-language support and mobile deployment.