Improving security of a chaotic encryption approach

被引:94
作者
Li, SJ [1 ]
Mou, XQ [1 ]
Cai, YL [1 ]
机构
[1] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Inst Image Proc, Xian 710049, Shaanxi, Peoples R China
关键词
chaotic cryptosystem; encryption; cryptanalysis;
D O I
10.1016/S0375-9601(01)00612-0
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
E. Alvarez et al. presented a new chaotic encryption approach recently. But soon G. Alvarez et al. broke it with four cryptanalytic methods and found some other weaknesses. In this Letter we point out why the original scheme is so vulnerable to the proposed four attacks. The chief reasons are two essential defects existing in the original scheme. Based on such a fact, we present an improved encryption scheme to obtain higher security. The cryptographic properties of the improved scheme are studied theoretically and experimentally in detail. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:127 / 133
页数:7
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