混沌序列多种周期现象的检测与抵抗方法研究

项目名称： 混沌序列多种周期现象的检测与抵抗方法研究

项目编号： No.61471158

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 丁群

作者单位： 黑龙江大学

项目金额： 88万元

中文摘要： 混沌序列具有非线性密钥序列难以破译的特点，由此构造的混沌序列密码将具有无限周期、无限密钥空间、高复杂度、抗攻击性强、轻量级、易于工程实现的优势。目前混沌与加密的关联已得到国际的认可，以混沌系统实现加密系统的研究也相继展开，尤其是随着大规模集成电路的迅猛发展，已经使高精度混沌运算电路难以实现类似问题逐渐减弱，使基于芯片级数字混沌序列密码研究向实用化推进。本项目主要针对基于芯片级数字混沌序列密码内部特性和外部成因展开研究，探求克服有限精度影响下的数字混沌序列存在的局部不平衡现象和弱随机问题，通过抽象局部范围内各类周期现象的数学特征，建立一种对数字混沌序列局部周期现象和随机性检测模型，为数字混沌序列随机性的整体检测提供有效的检测方法集，为数字混沌序列面临应用提供科学计算依据，在此基础上将进行抵抗数字混沌序列周期现象研究，提高数字混沌序列密码随机性能指标，为保密通信的实际需求做好准备。

中文关键词： 混沌序列；序列密码；密码核；加密芯片；安全通信

英文摘要： Chaotic stream cipher, generated from chaotic sequences which are recognized as indecipherable nonlinear key sequences, with its features of infinite period, infinite key space, high complexity, good anti-attacking, lightweight, can be easily realized in engineering. Nowadays, in the wake of acceptance of chaotic cryptography, plenty of researches on chaotic encryption system are studied. Especially, with the rapid development of the large scale integrated circuits, the hardly realization problem of high-accuracy chaotic encryption system is solved gradually, propelling the use of digital chaotic stream cipher chips in practice. This project aims at doing researches on the internal characteristics and external causes of the digital chaotic stream cipher chips, and exploring the local imbalance phenomena and weak randomness problem in the chaotic binary sequences. Through finding and digging the mathematical features of varieties period phenomena in local scale of chaotic binary sequences, the project attempts to build a model that can detect the randomness and local period phenomena of chaotic binary sequences. This project will provide an effective method set of randomness detection and scientific computing evidence for chaotic binary sequences and its applications. On this basis, a new method, reducing the destructiveness of local period phenomena of chaotic binary sequence, will be proposed, thus the randomness of chaotic stream cipher chips will be enhanced. Therefore, the project is of great importance for its satisfying with the actual requirement of secure communication.

英文关键词： Chaotic sequence;Stream cipher;Cipher core;Encryption chip;Secure communication