Cryptanalysis and improvement of a block cryptographic scheme based on logistic map

YANG Ji-yun; LIAO Xiao-feng; XIAO Di; DENG Shao-jiang

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Cryptanalysis and improvement of a block cryptographic scheme based on logistic map

更新时间：2024-10-14

- Cryptanalysis and improvement of a block cryptographic scheme based on logistic map
- Vol. 29, Issue 12, Pages: 86-90(2008)
- 作者机构：
  
  重庆大学计算机学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP309.7
- Published：2008
- 稿件说明：
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YANG Ji-yun, LIAO Xiao-feng, XIAO Di, et al. Cryptanalysis and improvement of a block cryptographic scheme based on logistic map[J]. 2008, 29(12): 86-90.
DOI：

YANG Ji-yun, LIAO Xiao-feng, XIAO Di, et al. Cryptanalysis and improvement of a block cryptographic scheme based on logistic map[J]. 2008, 29(12): 86-90. DOI：

摘要

对一种改进的混沌分组密码机制分析后发现其本质上是流密码系统

并且密钥流与明文无关。通过选择明文攻击

在很小的计算代价下获得了密钥流。给出了选择明文攻击的算法

并通过实验进行了验证。为克服原加密算法的缺陷

采用密文反馈的形式使密钥流与明文相关。

Abstract

Through analyzed of an improved chaotic block cryptographic scheme

it was found that this scheme behaves as a stream cipher indeed and generated keystream is independent with plaintext. By means of chosen plaintext attack

the keystream used can easily be recovered with little computing. The algorithm a chosen plaintext attack was proposed and validated by experiment. In order to avoid the flaw

a remedy which makes keystream dependent with plaintext though ciphertext feedback was suggested while keeping all the merits of the original cryptosystem.

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