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Steganography “Hiding in Plain Sight” Gary Alan Davis, D.Sc. Department of Computer & Information Systems.

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Presentation on theme: "Steganography “Hiding in Plain Sight” Gary Alan Davis, D.Sc. Department of Computer & Information Systems."— Presentation transcript:

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2 Steganography “Hiding in Plain Sight” Gary Alan Davis, D.Sc. Department of Computer & Information Systems

3 Steganography – what is it? Covered Writing (Berinato, 2003) –from Greek “steganos” & “graphie” Earliest example (May, 1997) –Greece, 500 B.C. –Message tattooed on shaved head of slave –Message sent when hair grew back Goal: Hide the fact that message even exists (Glass, 2002)

4 Steganography in Technology Hiding messages within legitimate files –Picture (.bmp,.jpeg,.gif) –Audio (.wav,.mp3) –Video (.mpeg,.avi) Messages could be... (Fisher, 2004) –Trademark/copyright information –Communication to others –Malicious code

5 Good Steganography Watermarks –Identify copyrighted material –Deter unlicensed use –Deter piracy Digital Watermarks (Glass, 2002) –Robust Watermarks – use blocked if mark is detected –Fragile Watermarks – use blocked if mark is corrupted

6 Bad Steganography Malicious code (Fisher, 2004) –Viruses –Spyware Terrorist Communications (Kolata, 2001) –“Dead Drop” (e.g., eBay) –No direct communication –Difficult to detect hidden messages in files

7 Steganography Demo Steganography 1.7.1 15 day free trial $24.95 to purchase SecureKit, Inc. (www.securekit.com)

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15 Thank you! Any Questions? davis@rmu.edu


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