High-Speed Random-Channel Cryptography in Multimode Fibers
High-Speed Random-Channel Cryptography in Multimode Fibers
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DOI：
10.1109/jphot.2021.3049253
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发表时间：
2021-02
影响因子：
2.4
通讯作者：
Rachel Sampson;H. Wen;Bin Huang;R. Amezcua Correa;Y. Bromberg;H. Cao;Guifang Li
中科院分区：
文献类型：
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作者：
Rachel Sampson;H. Wen;Bin Huang;R. Amezcua Correa;Y. Bromberg;H. Cao;Guifang Li
我们提出并实验证明了多模光纤中的随机信道密码（RCC）的高速操作。RCC是基于多模光纤的随机信道状态和多维到一维投影的密钥生成和分配方法。两个合法用户共享的信道的强度透射率的倒数用于产生和分发相关密钥。在以前的工作中，RCC的关键率距离产品受到光速的限制。在这项工作中，我们表明，在通道的一端添加一个快速调制器，使关键速率和距离加倍，导致关键速率-距离乘积的显着改善，仅受光纤的模式色散的限制。实现了在64.7 Mbps $ \times $12 km的关键速率-距离乘积下的无差错传输，这比之前的演示高出七个数量级。所提出的方法的安全性来自窃听者和合法用户的测量复杂度之间的基本不对称。
We propose and experimentally demonstrate high-speed operation of random-channel cryptography (RCC) in multimode fibers. RCC is a key generation and distribution method based on the random channel state of a multimode fiber and multi-dimension to single-dimension projection. The reciprocal intensity transmittance of the channel shared between the two legitimate users is used to generate and distribute correlated keys. In previous work, RCC's key rate-distance product was limited by the speed of light. In this work, we show that adding a fast modulator at one end of the channel decouples the key rate and distance, resulting in a significant improvement in the key rate-distance product, limited only by the fiber's modal dispersion. Error-free transmission at a key rate-distance product of 64.7 Mbps $ \times $ 12 km, which is seven orders of magnitude higher than the previous demonstration, was achieved. The proposed method's security arises from a fundamental asymmetry between the eavesdroppers’ and legitimate users’ measurement complexity.