In recent years many chaotic cryptosystems based on Baptista's seminal work have been proposed. We analyze the security of two of the newest and most interesting ones, which use a dynamically updated look-up table and also work as stream ciphers. We provide different attack techniques to recover the keystream used by the algorithms. The knowledge of this keystream provides the attacker with the same information as the key and thus the security is broken. We also show that the dependence on the plaintext, and not on the key, of the look-up table updating mechanism facilitates cryptanalysis. (C) 2004 Elsevier B.V. All rights reserved.
机构:
San Diego State Univ, Nonlinear Dynam Grp, Dept Math, San Diego, CA 92182 USASan Diego State Univ, Nonlinear Dynam Grp, Dept Math, San Diego, CA 92182 USA
机构:
City Univ Hong Kong, Dept Comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept Comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R China
Wong, KW
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Ho, SW
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City Univ Hong Kong, Dept Comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept Comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R China
Ho, SW
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Yung, CK
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City Univ Hong Kong, Dept Comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept Comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R China
机构:
City Univ Hong Kong, Dept Comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept Comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R China
机构:
City Univ Hong Kong, Dept comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R China
机构:
San Diego State Univ, Nonlinear Dynam Grp, Dept Math, San Diego, CA 92182 USASan Diego State Univ, Nonlinear Dynam Grp, Dept Math, San Diego, CA 92182 USA
机构:
City Univ Hong Kong, Dept Comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept Comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R China
Wong, KW
;
Ho, SW
论文数: 0引用数: 0
h-index: 0
机构:
City Univ Hong Kong, Dept Comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept Comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R China
Ho, SW
;
Yung, CK
论文数: 0引用数: 0
h-index: 0
机构:
City Univ Hong Kong, Dept Comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept Comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R China
机构:
City Univ Hong Kong, Dept Comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept Comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R China
机构:
City Univ Hong Kong, Dept comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept comp Engn & Informat Technol, Kowloon, Hong Kong, Peoples R China