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Published in IET Communications Received on 3rd May 2010 Author(s): Y.F. Huang, S. Tang, Y. Zhang

Detection of covert voice-over Internet protocol communications using sliding window-based steganalysis. Published in IET Communications Received on 3rd May 2010 Author(s): Y.F. Huang, S. Tang, Y. Zhang. Outline. Introduction Sliding window-based steganalysis Experimental Results

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Published in IET Communications Received on 3rd May 2010 Author(s): Y.F. Huang, S. Tang, Y. Zhang

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  1. Detection of covert voice-over Internetprotocol communications using slidingwindow-based steganalysis Published in IET Communications Received on 3rd May 2010 Author(s): Y.F. Huang, S. Tang, Y. Zhang

  2. Outline • Introduction • Sliding window-based steganalysis • Experimental Results • Conclusion • Reference

  3. Introduction • VoIP steganography • LSB method

  4. Introduction(cont.) • RS(regular singular) algorithm • Jessica Fridrich proposed • F: flipping

  5. Sliding window-based steganalysis • Use formula below to set the length of window.

  6. Sliding window-based steganalysis(cont.) • Using RS method

  7. Sliding window-based steganalysis(cont.) • Getting the optimum detection threshold

  8. Experimental Results • Experiment framework • Intel Xeon 3065 CPU, 2GB memory, and a 1000 MB Ethernet interface card

  9. Experimental Results(cont.) • Comparisons between detection methods

  10. Experimental Results(cont.) • Comparisons between detection time

  11. Conclusion • Sliding RS method provides 64% improvement on the detection time over the conventional RS method. • Sliding RS method is suitable for detecting real-time stego VoIP streams.

  12. Reference • [1] Peticolas, F.A.P., Anderson, R.J., Kuhn, M.G.: ‘Information hiding – a survey’, Proc. IEEE, 1999, 87, (7), pp. 1062–1078. • [2] Artz, D.: ‘Digital steganography: hiding data within data’, IEEE Internet Comput., 2001, 5, (3), pp. 75–80. • [3] Fridrich, J., Goljan, M., Du, R.: ‘Detecting LSB steganography in color and grayscale images’, IEEE Multimedia, 2001, 8, (4), pp. 22–28.

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