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    A Scheme for Generating Key Sequences Based on Chaotic Control of m Sequence
    一种基于混沌控制m序列的密钥序列生成方案
    The nonlinear combining sequences as an important key sequence generators, its design and analysis are always hotspot and difficulty of stream cipher?
    非线性组合序列作为一类重要的密钥流生成器,其设计和分析一直是流密码研究的热点和难点。
    The results of searching in the Eukaryotic Promoter Database show that the +2~-71 region of this sequence is about 50% similarity to the key sequence of tomato pollen special gene LAT52 promoter and sunflower anther special gene SF2 promoter.
    通过EPD(TheEukaryoticPromoterDatabase)的比较发现 ,序列的 + 2~ - 71区域与番茄 (Lycopersiconescu lentum)花粉特异基因LAT5 2 ,向日葵 (Helianthusannuus)花药特异基因SF2启动子关键序列的同源性为 5 0 %左右
    The key sequence boundaries with different orders, the lasting time of different sequences and the characteristic of every sequence are studied.
    研究了层序的持续时限及限定地层层序级别的关键性界面,并分析了层序的沉积特征。
    These transfer zone adjusted the structure style and the framework. 5.The key sequence borders in lower Paleozoic were T74、T70.They were controlled by keytectonic events and displayed composite.
    (5)塔中地区下古生界关键层序界面为 T74、T70,这些关键层序界面的属性也表现出复合的特点:表现为岩性--时间界面,在不同的构造部位表现出不同的特点;
    Since the security of stream cipher depends on the randomness of key sequence and the intensity of the initial key, first we analyze sensitiveness of Lorenz chaotic system to initial conditions and parameters, and non-periodicity and pseudo-randomness of the chaotic sequence generated by Lorenz chaotic system. The optimum domain of initial values and parameters is obtained.
    由于序列密码算法的安全性依赖于密钥序列的随机性和初始密钥的强度,我们首先从动力系统的运动性态着手,分析了Lorenz混沌系统对初始条件和参数的敏感性以及由其生成的混沌序列的非周期性和类随机性,得出初值和参数的最佳取值范围。
    Since Lorenz chaotic system is a three-dimension dynamic system, we use the operation of one-time three bytes while doing iteration, which increase not only the processing speed, but also the period and randomness of the key sequence.
    由于Lorenz混沌系统是一个三维的动力系统,我们在算法中采用一次对三个字节进行运算的方法,从而不仅提高了处理速度,还增大了密钥序列的周期和随机性。
    Among the algorithmic design, the corresponding solution to the problems of transforming from the real sequence to binary sequence and precision in the chaotic stream cipher is put forward, and more efficient algorithm and better randomness of key sequence are obtained.
    在算法的设计中,我们对混沌序列密码所面临的实数序列到二进制序列的转化和精度等问题采取了相应的解决方法,从而获得较高的算法执行效率和良好的密钥序列随机性。
    Much computer simulations are done, and show that the new method can generate key sequences which match the requirements of secure communications, key sequences have the property of resisting attacking, key space is considerable large.
    大量的仿真研究表明,新方案所生成的密钥序列满足保密通信的要求,密钥序列具备较强的抗破译性能,密钥有非常大的取值空间;
    2. Based on the research of digital chaos communications, a new method that generates key sequences by using more chaotic equations is presented.
    2.在数字混沌保密通信研究的基础上,提出了一种多混沌方程协助生成密钥序列的新方案。
 

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