LTSB steganalysis based on quartic equation

Authors:
Xiangyang Luo;Chunfang Yang;Daoshun Wang;Fenlin Liu
Affiliations:
Zhengzhou Information Science and Technology Institute, Zhengzhou, China and Department of Computer Science and Technology, Tsinghua University, Beijing, China;Zhengzhou Information Science and Technology Institute, Zhengzhou, China;Department of Computer Science and Technology, Tsinghua University, Beijing, China;Zhengzhou Information Science and Technology Institute, Zhengzhou, China
Venue:
Transactions on data hiding and multimedia security II
Year:
2007

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Abstract

The LTSB (Least Two Significant Bit) planes steganalytic technique is discussed, and a detection method based on the Quartic Equation is presented. This method firstly constructs a finite-state machine including 16 kinds of state based on image pixel sample pairs, and then builds a quartic equation according to the states conversion relations, finally gains the estimated value by solving this equation. To enhance the precision of the estimate algorithm, an improved hypothesis is proposed, and a more robust quartic equation is constructed. Experiment results show that this approach can estimate the LTSB embedding ratio quite reliably.