Quantum-Secure Voting System: Leveraging QKD, Dual-Key Symmetric Encryption, and Receipt Verification for Practical Privacy and Integrity

Electronic voting systems are increasingly exposed to security risks, including cyberattacks and threats. These concerns are expected to grow with the development of quantum computing, which may break many classical encryption methods. This paper proposes a secure voting system that combines Quantum Key Distribution (QKD), Dual-Key Symmetric Encryption, and auditable receipts to improve the privacy, security, and reliability of the voting process. The system allows voters to exchange encryption keys securely, submit encrypted votes, and receive confirmation receipts without revealing their vote content. To test the system, quantum and classical communication were simulated using the Message Queuing Telemetry Transport (MQTT) messaging. The results show that the system can securely process a large number of votes with low delay and minimal errors. This approach provides a practical and forward-looking solution for building secure and verifiable electronic voting systems in the quantum era.