【摘要】：在信息安全領(lǐng)域、測(cè)試領(lǐng)域、工程實(shí)踐領(lǐng)域,隨機(jī)數(shù)都發(fā)揮著重要的作用。一般情況,隨機(jī)數(shù)發(fā)生器分為偽隨機(jī)數(shù)發(fā)生器和物理隨機(jī)數(shù)發(fā)生器。用計(jì)算機(jī)能夠產(chǎn)生高速偽隨機(jī)數(shù),但是偽隨機(jī)數(shù)具有周期性,尤其會(huì)對(duì)信息安全系統(tǒng)造成嚴(yán)重的后果。而基于量子力學(xué)、熱噪聲、振蕩器采樣和混沌電路等傳統(tǒng)物理熵源的物理隨機(jī)數(shù)發(fā)生器,卻由于熵源的帶寬限制,不能夠滿足當(dāng)前大容量通信的需求。直到混沌激光的出現(xiàn),才促進(jìn)了物理隨機(jī)數(shù)發(fā)生器的快速發(fā)展。由于混沌激光的高帶寬和大振幅的特點(diǎn),基于混沌激光的物理隨機(jī)數(shù)發(fā)生器得到了國(guó)內(nèi)外研究者的廣泛關(guān)注。目前,基于激光器外部參數(shù)(例如反饋強(qiáng)度、外腔長(zhǎng)度、激光器的偏置電流等)對(duì)光反饋混沌激光熵源生成隨機(jī)數(shù)的影響已經(jīng)有所研究討論,但是激光器內(nèi)部參數(shù)對(duì)生成隨機(jī)數(shù)性能的影響還沒有深入研究,這些參數(shù)對(duì)于獲取高質(zhì)量、高速率的隨機(jī)數(shù)有著重要的作用。本文圍繞基于寬帶混沌激光生成高速物理隨機(jī)數(shù)這一研究課題,展開了如下的工作內(nèi)容:1)介紹了三種混沌激光的產(chǎn)生方式,其中說(shuō)明了光反饋式相對(duì)其它二者的優(yōu)點(diǎn)。構(gòu)建了基于長(zhǎng)腔光反饋半導(dǎo)體激光器的混沌熵源,研究了外腔反饋率和注入電流比共同作用下對(duì)長(zhǎng)腔光反饋半導(dǎo)體激光器的混沌熵源特性的影響,重點(diǎn)研究了混沌信號(hào)復(fù)雜度和帶寬的動(dòng)態(tài)分布。研究結(jié)果表明,低反饋率和低注入電流比的混沌信號(hào)幅值分布趨于正態(tài)分布,有利于生成物理隨機(jī)數(shù)。2)介紹了基于長(zhǎng)腔光反饋半導(dǎo)體激光器的混沌熵源生成物理隨機(jī)數(shù)的產(chǎn)生流程,其中重點(diǎn)介紹并解釋了電采樣和電量化的含義、注意事項(xiàng)以及簡(jiǎn)單的后續(xù)處理。介紹并分析了NIST SP 800-22和Diehard兩種隨機(jī)數(shù)測(cè)試標(biāo)準(zhǔn)的使用方法,并解決了Diehard測(cè)試的格式轉(zhuǎn)換問(wèn)題。3)設(shè)計(jì)了基于長(zhǎng)腔光反饋半導(dǎo)體激光器的混沌熵源生成隨機(jī)數(shù)的方案,研究了激光器關(guān)鍵內(nèi)部參數(shù)對(duì)光反饋半導(dǎo)體激光器的混沌熵源生成隨機(jī)數(shù)性能的影響。仿真結(jié)果表明,隨著線寬增強(qiáng)因子、載流子壽命的增大,光反饋半導(dǎo)體激光器的混沌激光信號(hào)的延時(shí)峰值逐漸減小,相對(duì)應(yīng)的最大李指數(shù)逐漸增大。分別基于不同的線寬增強(qiáng)因子和載流子壽命產(chǎn)生的混沌信號(hào)提取隨機(jī)數(shù),利用NIST SP 800-22軟件對(duì)所生成的隨機(jī)數(shù)性能進(jìn)行測(cè)試,并討論了二者對(duì)混沌信號(hào)帶寬以及測(cè)試結(jié)果的影響。
[Abstract]:In the field of information security, testing, engineering practice, random numbers play an important role. In general, random number generator is divided into pseudorandom number generator and physical random number generator. High speed pseudorandom numbers can be generated by computer, but pseudorandom numbers have periodicity, especially for information security system. However, the traditional physical random number generator based on quantum mechanics, thermal noise, oscillator sampling and chaotic circuit can not meet the needs of large capacity communication due to the bandwidth limitation of entropy source. It was not until the chaotic laser appeared that the rapid development of physical random number generator was promoted. Due to the characteristics of high bandwidth and large amplitude of chaotic laser, the physical random number generator based on chaotic laser has been widely concerned by researchers at home and abroad. At present, the effects of external parameters (such as feedback intensity, external cavity length, bias current, etc.) on the random number generation of chaotic laser entropy source based on optical feedback have been discussed. However, the influence of laser internal parameters on the performance of generating random numbers has not been deeply studied. These parameters play an important role in obtaining high quality and high rate random numbers. This paper focuses on the research of generating high speed physical random numbers based on wideband chaotic laser. The main contents are as follows: 1) three kinds of chaotic laser generation methods are introduced and the advantages of optical feedback method compared with the other two are illustrated. A chaotic entropy source based on long cavity optical feedback semiconductor laser is constructed. The effects of external cavity feedback rate and injection current ratio on the chaotic entropy source characteristics of long cavity optical feedback semiconductor laser are studied. The dynamic distribution of complexity and bandwidth of chaotic signals is studied. The results show that the amplitude distribution of chaotic signals with low feedback rate and low injection current ratio tends to normal distribution. In this paper, the process of generating physical random numbers by chaotic entropy source based on long cavity optical feedback semiconductor laser is introduced. The meaning of electric sampling and electroquantization is introduced and explained emphatically. Attention and simple follow-up. This paper introduces and analyzes the application methods of NIST SP 800-22 and Diehard random number test standards, and solves the problem of format conversion of Diehard test. 3) A scheme of generating random numbers by chaotic entropy source based on long cavity optical feedback semiconductor laser is designed. The effect of the key internal parameters of the laser on the random number generation of the chaotic entropy source of the optical feedback semiconductor laser is studied. The simulation results show that with the increase of linewidth enhancement factor and carrier lifetime, the delay peak of chaotic laser signal of optical feedback semiconductor laser decreases gradually, and the corresponding maximum lie exponent increases gradually. Random numbers are extracted from chaotic signals generated by different linewidth enhancement factors and carrier lifetime, and the performance of the generated random numbers is tested by NIST SP 800-22 software. The influence of them on the bandwidth of chaotic signal and the test results are also discussed.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN248.4

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