Improved LSB matching steganography with histogram characters reserved

Zhihong Chen; Wenyao Liu

doi:10.1117/12.755324

4 January 2008 Improved LSB matching steganography with histogram characters reserved

Zhihong Chen, Wenyao Liu

Proceedings Volume 6837, Information Optics and Photonics Technologies II; 68370X (2008) https://doi.org/10.1117/12.755324
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

This letter bases on the researches of LSB (least significant bit, i.e. the last bit of a binary pixel value) matching steganographic method and the steganalytic method which aims at histograms of cover images, and proposes a modification to LSB matching. In the LSB matching, if the LSB of the next cover pixel matches the next bit of secret data, do nothing; otherwise, choose to add or subtract one from the cover pixel value at random. In our improved method, a steganographic information table is defined and records the changes which embedded secrete bits introduce in. Through the table, the next LSB which has the same pixel value will be judged to add or subtract one dynamically in order to ensure the histogram's change of cover image is minimized. Therefore, the modified method allows embedding the same payload as the LSB matching but with improved steganographic security and less vulnerability to attacks compared with LSB matching. The experimental results of the new method show that the histograms maintain their attributes, such as peak values and alternative trends, in an acceptable degree and have better performance than LSB matching in the respects of histogram distortion and resistance against existing steganalysis.

Citation Download Citation

Zhihong Chen and Wenyao Liu "Improved LSB matching steganography with histogram characters reserved", Proc. SPIE 6837, Information Optics and Photonics Technologies II, 68370X (4 January 2008); https://doi.org/10.1117/12.755324

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