Locally most-powerful detector for secret key estimation in spread spectrum image steganography

Shalin P. Trivedi; Rajarathnam Chandramouli

doi:10.1117/12.521394

22 June 2004 Locally most-powerful detector for secret key estimation in spread spectrum image steganography

Shalin P. Trivedi, Rajarathnam Chandramouli

Proceedings Volume 5306, Security, Steganography, and Watermarking of Multimedia Contents VI; (2004) https://doi.org/10.1117/12.521394
Event: Electronic Imaging 2004, 2004, San Jose, California, United States

Abstract

We define sequential steganography as those class of embedding algorithms that hide messages in consecutive (time, spatial or frequency domain) features of a host signal. This paper presents a steganalysis method that estimates the secret key used in sequential steganography. A theory is developed for detecting abrupt jumps in the statistics of the stego signal during steganalysis. Stationary and non-stationary host signals with low, medium and high SNR embedding are considered. A locally most powerful steganalysis detector for the low SNR case is also derived. Several techniques to make the steganalysis algorithm work for non-stationary digital image steganalysis are also presented. Extensive experimental results are shown to illustrate the strengths and weaknesses of the proposed steganalysis algorithm.

Citation Download Citation

Shalin P. Trivedi and Rajarathnam Chandramouli "Locally most-powerful detector for secret key estimation in spread spectrum image steganography", Proc. SPIE 5306, Security, Steganography, and Watermarking of Multimedia Contents VI, (22 June 2004); https://doi.org/10.1117/12.521394

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