Hyperchaotic system-based pseudorandom number generator
Hyperchaotic system-based pseudorandom number generator
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DOI：
10.1049/iet-ifs.2015.0024
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发表时间：
2016-11-01
影响因子：
1.4
通讯作者：
Tong, Xiaojun
中科院分区：
文献类型：
--
作者：
Liu, Yang;Tong, Xiaojun
伪随机序列在密码学领域非常重要。非线性和类随机行为等特征使得混沌系统适合生成伪随机序列。然而，大多数基于混沌的伪随机数生成器都有一个典型的缺点。也就是说，所有处理器中的有限精度可能导致混沌系统退化为周期函数或不动点。为了克服这个缺点，提出了一种基于超混沌的发生器。首先，构造了一个新的具有更大Lyapunov指数的超混沌系统。然后，使用优于许多其他基于线性反馈移位寄存器的发生器的自收缩发生器来扰动超混沌序列，以减少周期退化并提高序列的性能。所提出的发生器被命名为具有自收缩扰动发生器的超混沌发生器（H-SSP发生器）。分析结果表明H-SSP发生器具有较好的性能。
Pseudorandom sequences are very important in the field of cryptography. The characteristics such as non-linearity and random-like behaviours make chaotic systems suited to generate pseudorandom sequences. However, most of chaos-based pseudorandom number generators have a typical shortcoming. That is, the finite precision in all processors may cause the chaotic systems to degenerate into a periodic function or a fixed point. To overcome this shortcoming, a hyperchaos-based generator is proposed. First, a new hyperchaotic system with bigger Lyapunov exponent is constructed. Then the self-shrinking generator, which is superior to many other linear feedback shift register-based generators, is used to perturb the hyperchaotic sequences to decrease the period degeneration and improve the performance of the sequences. The proposed generator is named as hyperchaos with self-shrinking perturbance generator (H-SSP generator). The analysis results show that the H-SSP generator has better performance.