Quantum Key Generation Based on Quantum Decoherence

Jincheng Zhang

Published Sep 5, 2026• 0 citations

Abstract

This paper explores the concept of generating physically secure cryptographic keys leveraging the principles of quantum decoherence. The core idea revolves around exploiting the inherent sensitivity of quantum systems to environmental interactions, specifically the decoherence phenomenon, to create a key. The generated key's security is predicated on the fundamental laws of quantum mechanics, offering a robust defense against traditional attacks. This work details a theoretical framework for such a system, outlining the key generation process, the measurement protocols, and the resulting key distribution. The approach emphasizes the unique security advantages offered by quantum mechanics compared to classical cryptography. We propose a method for utilizing the rate of decoherence as a source of randomness, which is then used to construct the cryptographic key. The security analysis highlights the exponential key space growth associated with quantum systems, making brute-force attacks computationally infeasible. Furthermore, this work addresses potential challenges and future research directions in implementing a practical quantum key generation system based on decoherence.

DOI: 10.5281/zenodo.22341228

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