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A new chaotic cryptosystem
Authors:Jun Wei  Xiaofeng Liao  Kwok-wo Wong  Tao Xiang
Institution:

aDepartment of Computer Science and Engineering, Chongqing University, Chongqing 400044, PR China

bZhunyi Medical College, Zhunyi 563000, Guizhou, PR China

cDepartment of Computer Engineering and Information Technology, City University of Hong Kong, Hong Kong

Abstract:Based on the study of some previously proposed chaotic encryption algorithms, we found that it is dangerous to mix chaotic state or iteration number of the chaotic system with ciphertext. In this paper, a new chaotic cryptosystem is proposed. Instead of simply mixing the chaotic signal of the proposed chaotic cryptosystem with the ciphertext, a noise-like variable is utilized to govern the encryption and decryption processes. This adds statistical sense to the new cryptosystem. Numerical simulations show that the new cryptosystem is practical whenever efficiency, ciphertext length or security is concerned.
Keywords:
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