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Public key Steganography Using Discrete Cross-Coupled Chaotic Maps

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Author(s): Sodeif Ahadpour | Mahdiyeh Majidpour

Journal: Journal of Theoretical Physics and Cryptography
ISSN 2322-3138

Volume: 2;
Issue: 1;
Start page: 13;
Date: 2013;
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Keywords: Cross-coupled chaotic maps | Bifurcation | Statistical steganalysis | Least significant bits | Chi-square attack Introduction.

ABSTRACT
By cross-coupling two logistic maps a novel method is proposed for the public key steganography in JPEG image. Chaotic maps entail high complexity in the used algorithm for embedding secret data in a medium. In this paper, discrete cross-coupled chaotic maps are used to specifying the location of the different parts of the secret data in the image. Modifying JPEG format during compressing and decompressing, and also using public key enhanced difficulty of the algorithm. Simulation results show that in addition to excessive capacity, this method has high robustness and resistance against hackers and can be applicable in secret communication. Also the PSNR value is high compared to the other works.
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