Self-shrinking chaotic stream ciphers
Self-shrinking chaotic stream ciphers
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DOI：
10.1016/j.cnsns.2010.04.039
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发表时间：
2011-02
影响因子：
3.9
通讯作者：
A. Kanso
中科院分区：
文献类型：
--
作者：
A. Kanso
在过去的二十年里，越来越多的基于混沌的密码系统被建议用于密码应用。这些系统中的大多数都受到密码分析攻击，其中许多系统被证明缺乏安全性。本文将经典密码学中的自收缩技术引入到混沌系统中，设计了一种混沌密钥流生成器，该生成器能够生成具有良好统计特性的密钥流，具有较高的安全性。提出了一种基于一维混沌帐篷映射的样本自收缩混沌密钥流生成器。随机特性和结果的统计测试所产生的密钥流比特应用自收缩技术的混沌映射与适当的参数被发现令人鼓舞的。基于该技术的混沌密码系统在随机性和安全性方面都优于现有的密码系统。
In the last two decades, a growing number of chaos-based cipher systems have been suggested for use in cryptographic applications. Most of these systems were subject to cryptanalytic attacks, and many of them were shown to suffer from a lack of security. In this paper, we export the self-shrinking technique used in classical cryptography into chaotic systems to develop chaotic keystream generators capable of generating keystreams featuring very good statistical properties, and possessing high level of security. This paper proposes a sample self-shrinking chaos-based keystream generator implemented using a 1-D chaotic tent map. Randomness properties and results of statistical testing of keystream bits generated by applying the self-shrinking technique on chaotic maps with suitable parameters are found encouraging. Furthermore, chaotic cipher systems based on such technique are demonstrated to have a better performance in terms of randomness properties and security level than many existing cipher systems.