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科学通报  2011 

鲁棒的高速物理随机数发生器

DOI: 10.1360/972011-1305, PP. 2746-2752

Keywords: 混沌激光,随机数发生器,半导体激光器,信号差分,鲁棒性

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Abstract:

基于宽带混沌激光作为物理熵源,提出一个性能稳定的高速物理随机数发生器实现方案.利用差分比较器对宽带混沌信号延迟作差,再经由时钟控制的触发器进行采样保持以及后续异或处理,实验获得了速率为1.44Gbit/s的随机数.该方案免去了精确的阈值电压调节过程,利用差分比较纠正了混沌幅值概率密度分布的偏差,使混沌幅值分布的中值偏斜度系数为γ=1.5×10-6.此实验系统可抗外界波动信号的干扰,能够连续稳定工作至少12h.

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