AI 中文总结
本文针对量子身份认证提出基于压缩光场非经典特性的协议，利用正交压缩相干态特性及诱饵态保真度参数等，能抗高斯克隆攻击、检测窃听，四方向压缩可提高安全阈值，相比二元压缩协议有优势，便于实际应用。
AI 中文摘要
量子身份认证已成为安全通信系统的关键技术，尤其是在量子通信蓬勃发展的时代。本文提出了一种基于压缩光场非经典特性的新型量子身份认证协议。通过利用正交压缩相干态的量子降噪特性，该协议从根本上通过海森堡极限不确定性约束挫败窃听企图。利用诱饵态的保真度参数检测欺骗攻击，动态密钥更新机制从根本上消除了密钥重用导致的漏洞。安全信息率分析表明，该协议能够抵抗高斯克隆攻击并检测窃听。此外，通过更高的压缩可以进一步提高安全阈值，实现适用于不同威胁场景的可调保护级别。与二元压缩协议相比，我们提出的四方向（四元维）压缩将窃听者的猜测概率减半，并通过收紧判别阈值将保真度差距扩大29%，而无需依赖额外硬件，便于实际应用。
英文摘要
Quantum identity authentication (QIA) has emerged as a crucial technology for secure communication systems, particularly in the burgeoning era of quantum communications. This paper proposes a novel QIA protocol based on non-classical characteristics of squeezed light fields. By exploiting quantum noise reduction properties of quadrature squeezed coherent states, the protocol fundamentally thwarts eavesdropping attempts by Heisenberg-limited uncertainty constraints. The fidelity parameter for decoy states is utilized to detect spoofing attacks, and the dynamic key update mechanism fundamentally eliminates vulnerabilities caused by key reuse. Security information ratio analysis shows that the protocol is able to resist Gaussian-cloner attacks and detect eavesdropping. Moreover, the security threshold can be further enhanced with higher squeezing, allowing tunable protection levels adaptable to different threat scenarios. Compared with binary-squeezed protocols, our proposed four-direction (quaternary-dimensional) squeezing halves the eavesdropper's guessing probability and enlarges the fidelity gap by 29% tightening the discrimination threshold without relying on extra hardware, thus facilitating practical implementation.
Comments11 pages, 6 figures. Accepted for publication in AVS Quantum Science
