Cryptanalysis on a modified Baptista-type cryptosystem with chaotic masking algorithm

被引：12
作者：
Chen, Y [1 ]
Liao, XF [1 ]
机构：
[1] Chongqing Univ, Dept Comp Sci & Engn, Chongqing 400044, Peoples R China
来源：
PHYSICS LETTERS A | 2005年 / 342卷 / 5-6期
基金：
中国国家自然科学基金;
关键词：
chaotic cryptosystem; bit extracting function; chosen plaintext attack;
D O I：
10.1016/j.physleta.2005.05.048
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Based on chaotic masking algorithm, an enhanced Baptista-type cryptosystem is proposed by Li et al. to resist all known attacks [S. Li, X. Mou, Z. Ji, J. Zhang, Y. Cai, Phys. Lett. A 307 (2003) 22; S. Li, G. Chen, K.-W. Wong, X. Mou, Y. Cai, Phys. Lett. A 332 (2004) 368]. In this Letter, we show that the second class bit extracting function in [S. Li, X. Mou, Z. Ji, J. Zhang, Y. Cai, Phys. Lett. A 307 (2003) 22] still leak partial information on the current chaotic state and reduce the security of cryptosystem. So, this type bit extracting function is not a good candidate for the masking algorithm. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：389 / 396
页数：8
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