International Journal of Computer Network and Information Security(IJCNIS)
ISSN: 20749090 (Print), ISSN: 20749104 (Online)
Publisher: MECS IJCNIS Vol.4, No.7, July 2012
An Efficient Chaosbased Image Encryption Scheme Using Affine Modular Maps 

Full Text (PDF, 1012KB), PP.4150  
Author(s)  
Ruisong Ye,Haiying Zhao  
Index Terms  
Affine modular maps, Chaotic system, Image encryption, Permutation, Diffusion  
Abstract  
Linear congruential generator has been widely applied to generate pseudorandom numbers successfully. This paper proposes a novel chaosbased image encryption scheme using affine modular maps, which are extensions of linear congruential generators, acting on the unit interval. A permutation process utilizes two affine modular maps to get two index order sequences for the shuffling of image pixel positions, while a diffusion process employs another two affine modular maps to yield two pseudorandom gray value sequences for a twoway diffusion of gray values. Experimental results are carried out with detailed analysis to demonstrate that the proposed image encryption scheme possesses large key space to frustrate bruteforce attack efficiently and can resist statistical attack, differential attack, knownplaintext attack as well as chosenplaintext attack thanks to the yielded gray value sequences in the diffusion process not only being sensitive to the control parameters and initial conditions of the considered chaotic maps, but also strongly depending on the plainimage processed. 

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Citation  
Ruisong Ye,Haiying Zhao,"An Efficient Chaosbased Image Encryption Scheme Using Affine Modular Maps", IJCNIS, vol.4, no.7, pp.4150, 2012. 
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