Remote key establishment by random mode mixing in multimode fibers and optical reciprocity
Remote key establishment by random mode mixing in multimode fibers and optical reciprocity
复制标题
DOI：
10.1117/1.oe.58.1.016105
复制
发表时间：
2019-01-01
影响因子：
1.3
通讯作者：
Cao, Hui
中科院分区：
文献类型：
--
作者：
Bromberg, Yaron;Redding, Brandon;Cao, Hui
光子系统中的无序和散射长期以来被认为是应该避免的麻烦。最近，无序已经被利用于快速增长的应用，包括成像、传感和光谱学。混沌动力学和对外部扰动的极端敏感性使得随机介质特别适合于光学密码学。然而，使用随机介质在远程用户之间分发密钥仍然具有挑战性，因为它要求用户能够访问相同的散射样本。在这里，我们利用长多模光纤中的随机模式混合来同时生成和分发密钥。光纤模式混合中的快速波动为密钥生成提供了随机性的来源，并且光学互易性保证了光纤两端的密钥是相同的。我们通过实验证明了该方案使用经典的光和现成的组件，打开了一个实际上安全的密钥建立在光纤网络的物理层的大门。(C)作者。由SPIE在知识共享署名3.0未移植许可下发布。
Disorder and scattering in photonic systems have long been considered a nuisance that should be circumvented. Recently, disorder has been harnessed for a rapidly growing number of applications, including imaging, sensing, and spectroscopy. The chaotic dynamics and extreme sensitivity to external perturbations make random media particularly well-suited for optical cryptography. However, using random media for distribution of secret keys between remote users still remains challenging since it requires the users have access to the same scattering sample. Here, we utilize random mode mixing in long multimode fibers to generate and distribute keys simultaneously. Fast fluctuations in fiber mode mixing provide the source of randomness for key generation, and optical reciprocity guarantees that the keys at the two ends of the fiber are identical. We experimentally demonstrate the scheme using classical light and off-the-shelf components, opening the door for a practically secure key establishment at the physical layer of fiber-optic networks. (C) The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License.