Surmounting the Effects of Lossy Compression on Steganography
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Authors
Currie, Daniel L.
Irvine, Cynthia E.
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Date of Issue
1996-10
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Abstract
Steganographic techniques can be used to hide data within digital images
with little or no visible change in the perceived appearance of the image
and can be exploited to export sensitive information. Since images are frequently
compressed for storage or transmission, effective steganography
must employ coding techniques to counter the errors caused by lossy compression
algorithms. The Joint Photographic Expert Group (JPEG) compression
algorithm, while producing only a small amount of visual
distortion, introduces a relatively large number of errors in the bitmap
data. It is shown that, despite errors caused by compression, information
can be steganographically encoded into pixel data so that it is recoverable
after JPEG processing, though not with perfect accuracy.
Type
Article
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Department
Computer Science (CS)
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Citation
Proceedings of the 19th National Information System Security Conference, Baltimore, Md, October 1996,
pp. 194-201.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.