Security-enhanced chaos communication with time-delay signature suppression and phase encryption.
Security-enhanced chaos communication with time-delay signature suppression and phase encryption.
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DOI：
10.1364/ol.41.003690
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发表时间：
2016-08
期刊：
影响因子：
3.6
通讯作者：
Chenpeng Xue;N. Jiang;Yunxin Lv;Chao Wang;Guilan Li;Shuqing Lin;K. Qiu
中科院分区：
文献类型：
--
作者：
Chenpeng Xue;N. Jiang;Yunxin Lv;Chao Wang;Guilan Li;Shuqing Lin;K. Qiu
提出了一种基于双环反馈独立高速相位调制的抑制时间延迟信号（TDS）和相位加密反馈光的混沌保密通信方案。我们数值研究的TDS抑制的强度和相空间的属性和定量讨论的安全建议系统通过计算窃听者谁试图破解系统直接过滤检测到的信号或通过使用类似的半导体激光器同步的链路信号和提取数据的误码率。结果表明，通过适当地设置调制频率，可以很好地抑制嵌入混沌载波中的TDS，从而使窃听者无法获知系统的时延。此外，由于反馈光是加密的，没有准确的时间延迟和密钥，窃听者无法重建对称的操作条件和解码正确的数据。
A security-enhanced chaos communication scheme with time delay signature (TDS) suppression and phase-encrypted feedback light is proposed, in virtue of dual-loop feedback with independent high-speed phase modulation. We numerically investigate the property of TDS suppression in the intensity and phase space and quantitatively discuss security of the proposed system by calculating the bit error rate of eavesdroppers who try to crack the system by directly filtering the detected signal or by using a similar semiconductor laser to synchronize the link signal and extract the data. The results show that TDS embedded in the chaotic carrier can be well suppressed by properly setting the modulation frequency, which can keep the time delay a secret from the eavesdropper. Moreover, because the feedback light is encrypted, without the accurate time delay and key, the eavesdropper cannot reconstruct the symmetric operation conditions and decode the correct data.