Jiang Ning, Xue Chenpeng, Liu Ding, Lv Yunxin, Qiu Kun
Opt Lett. 2017 Mar 15;42(6):1055-1058. doi: 10.1364/OL.42.001055.
We propose and numerically demonstrate a secure key distribution scheme based on the dynamic chaos synchronization of two external cavity vertical-cavity surface-emitting lasers (VCSELs) subject to symmetric random-polarization injections. By exchanging the random parameters that control the polarization angles of the driving injection, Alice and Bob can identify the time slots in which high-quality private chaos synchronization is achieved and independently generate a shared key from the synchronized polarization difference signals of their local VCSELs. The results show that Gb/s key distribution with a low bit error ratio can be achieved, and the shared key can pass all NIST tests, which guarantee the randomness of the key. In the proposed scheme, the exchange messages do not contain any information about the key generation, which affords a high-level of security for key distribution.
我们提出并通过数值模拟演示了一种基于两个外腔垂直腔面发射激光器（VCSEL）动态混沌同步的安全密钥分发方案，该方案受对称随机偏振注入影响。通过交换控制驱动注入偏振角的随机参数，爱丽丝和鲍勃可以识别出实现高质量私有混沌同步的时隙，并从其本地VCSEL的同步偏振差信号中独立生成共享密钥。结果表明，可以实现具有低误码率的Gb/s密钥分发，并且共享密钥可以通过所有美国国家标准与技术研究院（NIST）测试，这保证了密钥的随机性。在所提出的方案中，交换的消息不包含任何有关密钥生成的信息，这为密钥分发提供了高度的安全性。
