Open AccessAn improved block cryptosystem based on iterating chaotic map
Author(s) -
Shutao Xu,
Jizhi Wang
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.37
Subject(s) - computer science , cryptosystem , chaotic , plaintext , block cipher , robustness (evolution) , algorithm , block (permutation group theory) , theoretical computer science , cryptography , mathematics , encryption , computer security , artificial intelligence , biochemistry , chemistry , geometry , gene
Recentlya large number of chaotic cryptosystems have been proposedyet many of them have the drawbacks of lack of robustness and security. In this paperwe point out the weakness of a very recent block cipher algorithm which is based on the chaotic map and give the improved scheme of it. We provide the chosen plaintext attack to recover the permuted plaintext string. It is shown that the generation mechanism of binary sequences which depends on the key but not on the plaintext facilitates leakage of information and is vulnerable to attacks. Based on such a factwe give the improved scheme to achieve higher security.