Title
Cryptanalysis of a chaotic block cipher with external key and its improved version
Abstract
Recently, Pareek et al. proposed a symmetric key block cipher using multiple one-dimensional chaotic maps. This paper reports some new findings on the security problems of this kind of chaotic cipher: (1) a number of weak keys exist; (2) some important intermediate data of the cipher are not sufficiently random; (3) the whole secret key can be broken by a known-plaintext attack with only 120 consecutive known plain-bytes in one known plaintext. In addition, it is pointed out that an improved version of the chaotic cipher proposed by Wei et al. still suffers from all the same security defects.
Year
DOI
Venue
2006
10.1016/j.chaos.2006.08.025
Chaos, Solitons & Fractals
Keywords
Field
DocType
cryptanalysis,chaos,encryption,known-plaintext attack,divide-and-conquer dac pacs: 05.45.ac/vx/pq,known plaintext attack,divide and conquer,block cipher
Transposition cipher,Weak key,Rail fence cipher,Running key cipher,Theoretical computer science,Stream cipher,Substitution cipher,Two-square cipher,Polyalphabetic cipher,Mathematics
Journal
Volume
Issue
ISSN
37
1
0960-0779
Citations 
PageRank 
References 
13
1.39
3
Authors
5
Name
Order
Citations
PageRank
Chengqing Li192864.94
Shujun Li21131116.82
Gonzalo Álvarez3131.39
Guanrong Chen4123781130.81
Kwok-Tung Lo566266.15