| Jiri Fridrich.
Methods for Data Hiding, Center for Intelligent Systems & Department of Systems Science and Industrial Engineering, SUNY Binghamton, Binghamton, NY 13902-6000.
[ZIP]
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Abstract: An overview of current steganographic methods for secret message hiding and digital watermarking is presented. A general theory of message hiding is used to put various techniques under a common umbrella. By interpreting watermarking as a key-dependent pattern overlaying, a new, robust watermarking scheme is proposed. The method is based on overlaying a pattern with its power concentrated mostly in low frequencies. The pattern is created using a pseudo-random number generator and a cellular automaton with voting rules. The robustness of the method with respect to filtering, JPEG compression, cropping, noise adding, and collusion is studied. The method also overcomes a possible weakness of the method of Cox et al. [Cox]. As part of the future directions, we propose a robust watermarking method which does not require the original image for watermark extraction.
Keywords: Steganography, cryptography, digital watermark [Cox] Cox J. I, J. Kilian, T. Leighton, and Shamoon T., Secure Spread Spectrum Watermarking for Multimedia," NEC Research Institute, Technical Report 95-10. This paper is also available in MS Word 7.0 | ||||||||
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