Journal
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
Volume 12, Issue 5, Pages 814-822Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cnsns.2005.06.001
Keywords
Chaotic cryptosystem; External key; Cryptanalysis; Remedial modification
Categories
Funding
- National Natural Science Foundation of China [60271019]
- Doctorate Foundation from the Ministry of Education of China [20020611007]
- Post-doctoral Science Foundation of China
- Natural Science Foundation of Chongqing [8509]
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Recently, a new chaotic cryptosystem using external 128-bit key and multiple chaotic maps has been proposed. In this paper, a fundamental flaw of this cryptosystem is pointed out and a known plaintext attack is presented. Furthermore, a remedial modification is suggested, which avoids the flaw while keeping all the merits of the original cryptosystem. (C) 2005 Published by Elsevier B.V.
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