David Stacey
ABSTRACT
This paper examines the statistical techniques used in blind steganalysis of JPEG images. Blind steganalysis attempts to detect the presence of covert data without knowing the particular steganographic algorithm used. This paper begins by discussing steganography and steganalysis in general with a focus on common techniques. JPEG images are then introduced with a detailed discussion of their format and how they are created. Once the details of JPEG images are understood, common JPEG steganographic algorithms are explained. These algorithms are available in programs like JSteg, Outguess, and F5. This paper focuses on the Calibration Technique and associated features developed by Fridrich.
The goal is to develop an application that detects covert data hidden in JPEG images by common steganographic algorithms. The output from this application is an indicator of whether or not the image contains covert data.
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Digital Library
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Index Terms
- Passive warden using statistical steganalysis
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