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arXiv 1406.4342quant-ph
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噪声信道下实验性量子密钥分发及有限密钥安全性分析

Experimental quantum key distribution with finite-key security analysis for noisy channels

Davide Bacco, Matteo Canale, Nicola Laurenti, Giuseppe Vallone, Paolo Villoresi

摘要:

在量子密钥分发实现中,通常选择每个会话足够长,使得秘密密钥速率接近其渐近极限。然而,这种选择可能受到实际情况的限制,如在卫星的前景使用中,一个终端通过另一个终端的时间被限制在几分钟内。在这里,我们证明了实验提取的安全密钥利用最佳设计的测量和测量方案,根据最近的有限密钥理论紧界。实验在不同的信道条件下进行,并假设两种不同的攻击模型:个人攻击,或一般的量子攻击。然后,根据密钥大小和环境量子比特错误率来获得关于交换的量子比特的数量的请求。结果表明,有效的对称,甚至一次一密,密码的可行条件是可以实现的。

英文摘要:

In quantum key distribution implementations, each session is typically chosen long enough so that the secret key rate approaches its asymptotic limit. However, this choice may be constrained by the physical scenario, as in the perspective use with satellites, where the passage of one terminal over the other is restricted to a few minutes. Here we demonstrate experimentally the extraction of secure keys leveraging an optimal design of the prepare-and-measure scheme, according to recent finite-key theoretical tight-bounds. The experiment is performed in different channel conditions, and assuming two distinct attack models: individual attacks, or general quantum attacks. The request on the number of exchanged qubits is then obtained as a function of the key size and of the ambient quantum bit error rate. The results indicate that viable conditions for effective symmetric, and even one-time-pad, cryptography are achievable.

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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