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ANTI-FORENSICS OF MEDIAN FILTERING
Conference proceeding

ANTI-FORENSICS OF MEDIAN FILTERING

Zhung-Han Wu, Matthew C. Stamm, K. J. Ray Liu and IEEE
2013 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP), pp 3043-3047
01 Jan 2013

Abstract

Acoustics Engineering Engineering, Electrical & Electronic Science & Technology Technology
A number of forensic techniques have been developed to identify the use of digital multimedia editing operations. In response, several anti-forensic operations have been designed to fool forensic algorithms. One operation that has received considerable attention is median filtering, since it can be used for image enhancement or anti-forensic purposes. As a result, several median filtering detectors have been developed. In this paper, we propose an anti-forensic technique to disguise the use of median filtering. We do this by first proposing a model for an unaltered image's pixel difference distribution. We then modify a median filter image's pixel difference distribution using anti-forensic noise so that it no longer contains median filtering fingerprints. Through a series of experiments, we are able to show that our anti-forensic technique can fool existing median filtering detectors under realistic conditions.

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Web of Science research areas
Acoustics
Engineering, Electrical & Electronic
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