摘要
利用光反馈半导体激光器产生的混沌激光作为物理熵源,通过光电转换、模数转换以及异或处理等手段,实验获得了码率可调谐的随机码.基于这一原理,研制出了最高码率为2.5 Gbit/s的物理随机码发生器样机.该样机能长时间稳定工作,可实时输出码率与通信速率相一致的随机码——155 Mbit/s,622 Mbit/s,1.25 Gbit/s,2.5 Gbit/s等.所产生的随机码均可通过NIST随机数测试标准,可为实现绝对安全的"一次一密"保密通信提供高速实时物理密钥.
Chaotic light generated by optical feedback semiconductor laser is employed as entropy source. We experimentally obtain random bit sequences of different rates by using a series of processing on chaotic signals, such as photoelectric conversion, analog-digital conversion, and exclusive OR operation. Based on the principle, we develop a 2.5 Gbit/s physical random bit generator prototype which can steadily run for a long time. It can generate random bit sequence at 155 Mbit/s, 622 Mbit/s, 1.25 Gbit/s, 2.5 Gbit/s and so on, whose rates are consistent with the current communication rates. All random bit sequences with different bit rates pass all of the NIST statistical tests. The generated random bits will be used as high-speed real-time physical keys for the one-time padding secure communication.
出处
《科学通报》
EI
CAS
CSCD
北大核心
2013年第21期2049-2056,共8页
Chinese Science Bulletin
基金
国家自然科学基金(60927007
61227016
61001114
61205142)资助
关键词
混沌激光
半导体激光器
随机码发生器
熵源
保密通信
chaotic laser
semiconductor laser
random bit generator
entropy source
secure communication
