Quantum-Resistant Password Generation A Comprehensive Model with QNN, Simplified Entropy, and QKD Integration

Passwords remain a universal mechanism for user authentication, yet they are troubled by weak choices and vulnerabilities. The arrival of quantum computing threatens to worsen these issues by enabling faster password cracking. Conventional wisdom suggests using longer or more complex passwords to counter quantum attacks, but this approach can be impractical.In this paper, we propose a novel quantum-resistant password generation framework that leverages a Quantum Neural Network (QNN) to create highly secure passwords. Our approach combines quantum machine learning with entropy-based rigorous analysis to ensure that generated passwords are resilient even against adversaries equipped with quantum computing capabilities. We design and train a QNN using large-scale password datasets (including RockYou, Have I Been Pwned, and others) to learn the distribution of common passwords and then generate passwords that avoid these patterns. To rigorously quantify security, we replace simplistic entropy estimations with a von Neumann entropy analysis, measuring the quantum entropy of the password generation process. The experimental results demonstrate that our QNN-generated passwords achieve significantly higher entropy and resistance to guessing attacks compared to conventional methods. This research highlights how quantum computing can be harnessed not only as a threat but as a tool to enhance security.