Steganalysis with mismatched covers: do simple classifiers help?

  • Authors:
  • Ivans Lubenko;Andrew D. Ker

  • Affiliations:
  • University of Oxford, Oxford, United Kingdom;University of Oxford, Oxford, United Kingdom

  • Venue:
  • Proceedings of the on Multimedia and security
  • Year:
  • 2012

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Abstract

Modern steganalysis can be incredibly sensitive and accurate, but only in an artificial setting in which the training data is from the exact same image source as the data being tested. When faced with mismatched training data, performance degrades, often substantially. Some recent publications have advocated the use of very simple classifiers for steganalysis. It is folklore from the machine learning literature that simple classifiers may be more robust to variations between training and testing data, and this paper investigates whether this is true for steganalysis also. Simple classifiers are compared with the classic complex Kernel Support Vector Machine, faced with training data which is mismatched with the testing data. A real-world source of images is used.