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arXiv quant-ph/9905009quant-ph
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用于安全自由空间通信的实用量子密码

Practical quantum cryptography for secure free-space communications

Richard J. Hughes, William T. Buttler, Paul G. Kwiat, Steve K. Lamoreaux, George L. Morgan, Jane E. Nordholt, C. G. Peterson

摘要:

量子密码学是一种新兴技术,其中双方可以使用光的量子态的传输来同时生成共享的秘密密码密钥材料。这些传输的安全性是基于量子力学定律的不可侵犯性和信息理论上安全的后处理方法。由于海森堡的不确定原理,对手既不能成功地窃听量子传输,也不能逃避检测。在本文中,我们描述了量子密码学的理论,以及我们的实验性自由空间系统的最新结果,我们首次证明了在日光下通过点对点室外大气路径生成量子密钥的可行性。我们实现了0.5 km的传输距离,这仅受测试范围长度的限制。我们的研究结果提供了强有力的证据,证明加密密钥材料可以在地面站和卫星之间(或两颗卫星之间)按需生成,允许卫星在轨道上安全地重新加密。我们提出了一个可行性分析的表面到卫星的量子密钥生成。

英文摘要:

Quantum cryptography is an emerging technology in which two parties may simultaneously generate shared, secret cryptographic key material using the transmission of quantum states of light. The security of these transmissions is based on the inviolability of the laws of quantum mechanics and information-theoretically secure post-processing methods. An adversary can neither successfully tap the quantum transmissions, nor evade detection, owing to Heisenberg's uncertainty principle. In this paper we describe the theory of quantum cryptography, and the most recent results from our experimental free-space system with which we have demonstrated for the first time the feasibility of quantum key generation over a point-to-point outdoor atmospheric path in daylight. We achieved a transmission distance of 0.5 km, which was limited only by the length of the test range. Our results provide strong evidence that cryptographic key material could be generated on demand between a ground station and a satellite (or between two satellites), allowing a satellite to be securely re-keyed on orbit. We present a feasibility analysis of surface-to-satellite quantum key generation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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