Fast physical random bit generation with chaotic semiconductor lasers
Fast physical random bit generation with chaotic semiconductor lasers
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DOI：
10.1038/nphoton.2008.227
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发表时间：
2008-12-01
期刊：
影响因子：
35
通讯作者：
Davis, Peter
中科院分区：
文献类型：
--
作者：
Uchida, Atsushi;Amano, Kazuya;Davis, Peter
数字信息系统中的随机数生成器利用物理熵源，如电子和光子噪声，为确定性生成的伪随机序列增加不可预测性（1,2）。然而，现有物理来源的生成速率与许多计算和通信系统的高数据速率之间存在很大差距；这是这些系统的根本弱点。在这里，我们展示了高质量的随机位序列可以在半导体激光器中使用物理混沌以非常快的比特率生成。通过对两个混沌激光器的波动光输出进行采样，以高达1.7 Gbps的速率产生了通过随机性标准统计测试的比特流。这个速率比先前报道的具有验证随机性的物理随机位生成器的设备快一个数量级。这意味着使用混沌激光器件作为物理熵源可以大大提高随机数发生器的性能。
Random number generators in digital information systems make use of physical entropy sources such as electronic and photonic noise to add unpredictability to deterministically generated pseudo-random sequences(1,2). However, there is a large gap between the generation rates achieved with existing physical sources and the high data rates of many computation and communication systems; this is a fundamental weakness of these systems. Here we show that good quality random bit sequences can be generated at very fast bit rates using physical chaos in semiconductor lasers. Streams of bits that pass standard statistical tests for randomness have been generated at rates of up to 1.7 Gbps by sampling the fluctuating optical output of two chaotic lasers. This rate is an order of magnitude faster than that of previously reported devices for physical random bit generators with verified randomness. This means that the performance of random number generators can be greatly improved by using chaotic laser devices as physical entropy sources.