LLRT based detection of LSB hiding

In this paper we consider a hypothesis testing approach for detection of hiding in the least significant bit (LSB). This steganalysis problem is a composite hypothesis testing problem. We state a regularity condition on the image histogram, which reduces this problem to a simple hypothesis testing problem. We then develop a number of simple practical tests based on the estimation of the optimal log likelihood ratio statistic. We show that our tests significantly outperform Stegdetect, a popular hypothesis test available in the literature. Our approach also leads to good estimates of the hiding rate.

• Type: Conference
• Year: 2003
• Where: ICIP
• Authors: Kenneth Sullivan, Onkar Dabeer, Upamanyu Madhow, B. S. Manjunath, Shivkumar Chandrasekaran
• Keywords: Composite Hypothesis Testing, Hypothesis Testing Approach, Hypothesis Testing Problem, ICIP 2003, Image Processing, Popular Hypothesis Test, Simple Hypothesis Testing