Feedback Phase in Optically Generated Chaos: A Secret Key for Cryptographic Applications
Feedback Phase in Optically Generated Chaos: A Secret Key for Cryptographic Applications
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DOI：
10.1109/jqe.2007.911687
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发表时间：
2008-01
影响因子：
2.5
通讯作者：
A. Bogris;Panagiotis Rizomiliotis;K. Chlouverakis;A. Argyris;D. Syvridis
中科院分区：
文献类型：
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作者：
A. Bogris;Panagiotis Rizomiliotis;K. Chlouverakis;A. Argyris;D. Syvridis
本文首次将半导体激光器在延迟光反馈作用下的反馈相位作为保密混沌通信的密钥，并不完全基于硬件唯一性。大量的数值模拟表明，反馈相位是极其重要的同步而言。窃听者攻击的强度调制的消息时，伪随机变化的反馈相位施加在发射机侧的能力是数字量化的误码率计算。分析表明，窃听者是不能够同步，因此提取的消息时，他不知道的相位变化，即使他配备了一个相同的混沌设备。
The feedback phase in a chaotic system consisting of a semiconductor laser subject to delayed optical feedback is considered for the first time as a secret key for secure chaotic communications not exclusively based on hardware uniqueness. Extensive numerical simulations illustrate that the feedback phase is of extreme importance as far as synchronization is concerned. The ability of an eavesdropper to attack the intensity-modulated message when a pseudorandom variation of the feedback phase is imposed at the transmitter's side is numerically quantified by bit-error-rate calculations. The analysis demonstrates that the eavesdropper is not able to synchronize and hence to extract the message when he is not aware of the phase variations even if he is equipped with an identical chaotic device.