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http://dx.doi.org/10.13089/JKIISC.2004.14.4.39

A Steganalysis using Blockiness in JPEG images  

장정아 (고려대학교 정보보호기술연구센터)
유정재 (고려대학교 정보보호기술연구센)
이상진 (고려대학교 정보보호기술연구센터)
Publication Information
Journal of the Korea Institute of Information Security & Cryptology / v.14, no.4, 2004 , pp. 39-47 More about this Journal
Abstract
In general, the steganographic algorithm for embedding message in JPEG images, such as Jsteg$^{(1)}$ , JP Hide ＆ Seek$^{(2)}$ , F5$^{(3)}$ , outGuess$^{(4)}$ replaces the LSB of DCT coefficients by the message bits. Both Jsteg and n Hide ＆ seek are detected by $\chi$$^2$- test, steganalytic technique$^{(4)}$ , the rate of detection is very low, though. In this Paper, we Propose a new steganalysis method that determine not only the existence of hidden messages in JPEG images exactly, but also the steganographic algorithm used. This method is advanced from the technique Blockiness$^{(5)}$ . It has many advantages that include a computational efficiency, correctness and that can detect without bowing steganographic algorithm. Experiment results show the superiority of our approach over Blockiness$^{(5)}$ .
Keywords
Stegangraphy; Blockiness; DCT(Discrete Cosine Transform);
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