摘要
本文提出采用可集成的激光器阵列后处理光反馈半导体激光器的输出,进而获得无时延特征的优质混沌熵源,进一步获取高速高品质随机数序列.方案中采用常规的8位模数转换采样量化和多位最低有效位异或提取处理,采用国际公认的随机数行业测试标准(NIST SP 800-22)来检验产生的序列.结果表明,通过激光器阵列后处理的混沌熵源所获取的随机数序列具有均匀的分布特性,散点图无明显图案,可以成功通过NIST SP 800-22的全部测试.另外,基于激光器阵列的可扩展性,本方案可以拓展为可实现同时产生多路并行的高速高品质随机数发生器.
With the rapid development of the computer technology and communication technology,as well as the popularization of the Internet,information security has received much attention of all fields.To ensure the information security,a large number of random numbers must be generated.It is well accepted that random numbers can be divided into physical random numbers and pseudo random numbers.The pseudo random numbers are mainly generated based on algorithms,which can be reproduced once the seed is decoded.The physical random numbers are extracted from physical entropies.While the bandwidth of the traditional physical entropy source is quite small,the bit rate of generated physical random numbers is limited.In the literature,a lot of methods have been proposed to produce high-quality and high-speed random number sequences with the chaotic entropy source,which exhibits wide bandwidth,large amplitude and random fluctuations.Usually,a semiconductor laser with optical feedback,i.e,an external-cavity semiconductor laser(ECSL),is chosen as a chaotic entropy source to generate a chaotic signal output.However,the chaotic signal output has a high time delay characteristic,which is not conducive to the production of high-quality random numbers.In this paper,to produce high-quality chaos with time-delay signature(TDS)being well suppressed,we propose to employ an integration-oriented phased-array semiconductor laser to post-process the original chaos generated by an ECSL.It is shown that the proposed laser array is effective in TDS suppression,which improves the quality of optical chaos.After certain necessary post-processing,high-speed and high-quality random number sequences can be achieved.In this paper,we employ the conventional post-processing techniques,which include an 8-bit analog-to-digital converter(ADC)for sampling and quantization,and m-bits least significant bit(m-LSB)and exclusive OR(XOR)for removing bias.The simulation results show that the random number sequences obtained from the chaotic entropy source comprised of
作者
吴佳辰
宋峥
谢溢锋
周心雨
周沛
穆鹏华
李念强
Wu Jia-Chen;Song Zheng;Xie Yi-Feng;Zhou Xin-Yu;Zhou Pei;Mu Peng-Hua;Li Nian-Qiang(School of Optoelectronic Science and Engineering,Collaborative Innovation Center of Suzhou Nano Science and Technology,Soochow University,Suzhou 215006,China;Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province,Key Lab of Modern Optical Technologies of Education Ministry of China,Soochow University,Suzhou 215006,China;Institute of Science and Technology for Opto-Electornic Information,Yantai University,Yantai 264005,China)
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2021年第10期151-158,共8页
Acta Physica Sinica
基金
国家自然科学基金(批准号:62004135,62001317)
江苏省高等学校自然科学研究重大项目(批准号:20KJA416001)
苏州大学科研启动经费(批准号:Q415900119)资助的课题.
关键词
半导体激光器
激光器阵列
混沌激光
随机数
semiconductor lasers
phased-array semiconductor lasers
laser chaos
random number
