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Symmetry 2018, 10(1), 19; doi:10.3390/sym10010019

Efficient Information Hiding Based on Theory of Numbers

1
Department of Information Engineering and Computer Science, Feng Chia University, Taichung 407, Taiwan
2
Department of Computer Science, Xiamen University of Technology, Xiamen 361024, China
*
Author to whom correspondence should be addressed.
Received: 2 December 2017 / Revised: 26 December 2017 / Accepted: 3 January 2018 / Published: 8 January 2018
(This article belongs to the Special Issue Emerging Data Hiding Systems in Image Communications)
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Abstract

Data hiding is an efficient technique that conceals secret data into a digital medium. In 2006, Zhang and Wang proposed a data hiding scheme called exploiting modification direction (EMD) which has become a milestone in the field of data hiding. In recent years, many EMD-type data hiding schemes have been developed, but their embedding capacity remains restricted. In this paper, a novel data hiding scheme based on the combination of Chinese remainder theorem (CRT) and a new extraction function is proposed. By the proposed scheme, the cover image is divided into non-overlapping pixel groups for embedding to increase the embedding capacity. Experimental results show that the embedding capacity of the proposed scheme is significantly higher (greater than 2.5 bpp) than previously proposed schemes while ensuring very good visual quality of the stego image. In addition, security analysis is given to show that the proposed scheme can resist visual attack. View Full-Text
Keywords: data hiding; exploiting modification direction (EMD); Chinese remainder theorem (CRT); extraction function; embedding capacity data hiding; exploiting modification direction (EMD); Chinese remainder theorem (CRT); extraction function; embedding capacity
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Liu, Y.; Chang, C.-C.; Huang, P.-C.; Hsu, C.-Y. Efficient Information Hiding Based on Theory of Numbers. Symmetry 2018, 10, 19.

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