基于双超混沌映射的伪随机序列发生器设计

Design of pseudo-random number generator based on double hyperchaotic mapping

有限精度下的混沌退化问题影响伪随机序列发生器性能。本文基于2D-SLIM和2D-LSCM超混沌系统提出一种迭代序列耦合的伪随机序列发生器方案。首先采用随机周期扰动方式防止混沌退化,随后对迭代序列进行耦合输出,并构建伪随机序列发生器模型。然后采用SP800-22 Revision 1a测试标准对生成序列进行随机性检测。实验结果表明,伪随机序列具有良好的随机性能。此外,基于方案生成的伪随机序列发生器设计了一种音频数据加密方案并对其进行仿真验证。

The chaotic degradation problem under finite precision affects the performance of the pseudo-random generator.Therefore,an iterative sequence coupling pseudo-random generator scheme is proposed based on the 2D-SLIM and 2D-LSCM hyperchaotic system.Firstly,the random periodic disturbance method is used to prevent the chaos degradation,and then the iterative sequences are coupled to the output and the pseudo-random sequence generator model is constructed.The SP800-22 Revision 1a test standard is used to test the randomness of the generated sequence,and the results show that the pseudo-random sequence has good randomness.Furthermore,an audio data encryption scheme is designed based on the proposed pseudo-random sequence generator and simulated to verify it.