Multiple messages embedding using DCT-Based mod4 steganographic method

Authors:
KokSheik Wong;Kiyoshi Tanaka;Xiaojun Qi
Affiliations:
Faculty of Engineering, Shinshu University, Nagano, Japan;Faculty of Engineering, Shinshu University, Nagano, Japan;Department of Computer Science, Utah State University, Logan, Utah
Venue:
MRCS'06 Proceedings of the 2006 international conference on Multimedia Content Representation, Classification and Security
Year:
2006

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Abstract

This paper proposes an extension of DCT-based Mod4 steganographic method to realize multiple messages embedding (MME). To implement MME, we utilize the structural feature of Mod4 that uses vGQC (valid group of 2 ×2 adjacent quantized DCT coefficients) as message carrier. vGQC's can be partitioned into several disjoint sets by differentiating the parameters where each set could serve as an individual secret communication channel. A maximum number of 14 independent messages can be embedded into a cover image without interfering one message and another. We can generate stego images with image quality no worse than conventional Mod4. Results for blind steganalysis are also shown.