Quantum asymmetric cryptography with symmetric keys

TL;DR

This paper introduces a novel quantum public-key cryptography scheme utilizing symmetric keys, leveraging quantum mechanics to ensure security, and analyzes its feasibility, security features, and resistance to certain attacks.

Contribution

It presents a new quantum cryptography framework that uniquely employs symmetric keys in a public-key setting, differing from traditional approaches.

Findings

The scheme is feasible based on quantum mechanics principles.

Security analysis confirms robustness against specific attacks.

The scheme offers a different paradigm from classical public-key cryptography.

Abstract

Based on quantum encryption, we present a new idea for quantum public-key cryptography (QPKC) and construct a whole theoretical framework of a QPKC system. We show that the quantum-mechanical nature renders it feasible and reasonable to use symmetric keys in such a scheme, which is quite different from that in conventional public-key cryptography. The security of our scheme is analyzed and some features are discussed. Furthermore, the state-estimation attack to a prior QPKC scheme is demonstrated.