One-third probability embedding: Less detectable LSB steganography

Authors:
Saeed Sarreshtedari;Mohsen Ghotbi;Shahrokh Ghaemmaghami
Affiliations:
Sharif University of Technology, Tehran, Iran;Sharif University of Technology, Tehran, Iran;Sharif University of Technology, Tehran, Iran
Venue:
ICME'09 Proceedings of the 2009 IEEE international conference on Multimedia and Expo
Year:
2009

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Abstract

This paper introduces a new method for the least significant bit (LSB) steganography in spatial domain. The new method, called one-third LSB embedding, reduces the probability of change per pixel to one-third without sacrificing the embedding capacity, as compared to previous LSB steganography techniques. This improvement results in a better imperceptibility and higher robustness against well known LSB detectors. Each bit of the message is carried through a function of three adjacent cover pixels and it is shown that no significant improvement is achieved by increasing the length of the pixel sequence employed.