基于混沌的强替换盒设计

Musheer Ahmad, Faiyaz Ahmad, Zeba Nasim, Zohra Bano, Shadab Zafar
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引用次数: 21

摘要

替换盒是AES、DES、IDEA等分组加密技术不可缺少的组成部分。以一种高效的方式设计有效的s盒是很重要的。本文提出了一种生成有效s盒的方法。提出了一种产生候选输入s框的新方法。首先对混沌映射的轨迹进行采样得到初始s盒,然后进行栅格扫描和锯齿形扫描,进一步提高s盒的质量。迭代1000次,选取其中最优的s盒作为输入s盒。然后在选定的k个s框上应用合成。生成的S-box根据不同的性能标准进行测试。性能测试结果表明,该方法具有良好的密码强度,是设计强分组密码非线性组件的有效方法。
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Designing chaos based strong substitution box
Substitution boxes are the indispensable part of block ciphering techniques such as AES, DES, IDEA, etc. It is important to design effective S-boxes in an efficient way. In this paper, a method to generate effective S-boxes is proposed. A new technique is suggested to produce the input S-boxes candidates. An initial S-box is obtained by sampling the trajectory of chaotic maps followed by raster and zigzag pattern scanning are performed to further enhance the quality of S-box. Iterating it 1000 times and the best S-box among them is chosen to be given as input S-box. Then a composition is applied on the selected k S-boxes. The generated S-box is tested against different performance criteria. The results of performance tests depict good cryptographic strength and prove it to be the promising method to design a nonlinear component for strong block cipher.
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