Secure Internet Voting using Blockchain Technology

Many countries have been using online voting systems instead of ballot papers. In such voting systems, voters can cast votes online using their cell phones, laptops, and other internet-connected devices. Online voting systems have centralized databases where a malicious attacker can hack, change or manipulate the database. Therefore, current online voting systems present a security concern for any government. Blockchain is a peer-to-peer technology in which data is stored in a tamper-proof ledger and maintained by participating peers. In this paper, we propose a secure online voting system using Ethereum Blockchain and Ethereum Smart Contracts. A voter can cast her vote securely after scanning her fingerprint and iris recognition. Our proposed methodology uses Paillier homomor-phic encryption and the private key shifting technique to ensure voter privacy and identity security.