Open AccessSecurity of chaos-based secure communications in a large community
Author(s) -
Kai Wang,
Wei Pei,
Jiantao Zhou,
Yifeng Zhang,
Siyuan Zhou
Publication year - 2011
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.60.070503
Subject(s) - cryptosystem , computer science , chaos (operating system) , chaotic , secure communication , dependency (uml) , constant (computer programming) , scheme (mathematics) , simple (philosophy) , key (lock) , cryptography , encryption , theoretical computer science , algorithm , computer security , mathematics , artificial intelligence , mathematical analysis , philosophy , epistemology , programming language
In this paper, we present an attack on a cryptosystem designed by using a spatiotemporal chaotic system. We show that the decryption system proposed in (Phys. Rev. E 66, 065202 (2002)) degenerates to the one-dimensional map under the constant input, and it is insensitive to the slight perturbations to input in specially selected intervals. Consequently, the attacker can use a very simple optimization algorithm to obtain the proper input value within only hundreds of iterations. Furthermore, we prove that there exits a linear dependency between the secret key and the obtained input value, so that the attacker can break this spatiotemporal chaos-based secure communication scheme easily. Both theoretical and experimental results show that the lack of security discourages the use of these cryptosystems for practical application.