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Information Hiding

Information Hiding. Nattawat Laksanawisit At National Chi Nan University. Outline. What is Information Hiding? What is Steganography ? What differences between Steganography and Cryptography. Demonstrate idea of Information Hiding. Conclusion the Idea of Information Hiding. Reference.

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Information Hiding

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  1. Information Hiding Nattawat Laksanawisit At National Chi Nan University

  2. Outline • What is Information Hiding? • What is Steganography ? • What differences between Steganography and Cryptography. • Demonstrate idea of Information Hiding. • Conclusion the Idea of Information Hiding. • Reference

  3. What is Information Hiding? • The word Information Hiding is means “covered or hidden messages” or protecting other parts of the information from change.

  4. What is Steganography ? • The word steganography literally means covered writing as derived from Greek • Steganography is the art and Science of writing hidden messages often by mixing it into noise of another.(Images, Texts, Sound) • Steganography conceals the fact that a message is being sent.

  5. What is Steganography ? (continue) • The term Steganography includes the concealmentof digital information within computer files. • A message sent by a German spy during World War II read: “Apparently neutral’s protest is thoroughly discounted and ignored. Isman hard hit. Blockade issue affects for pretext embargo on by-products, ejecting suets and vegetable oils.” “Pershing sails for NY june 1 “

  6. Steganography • What to hide • Text • Images • Sound • How to hide • Embed text in text/image/sound files • Embed image in text/image/sound files • Embed sound in text/image/sound files

  7. What differences between Steganography and Cryptography. • Steganography is the art of concealing the existence of information within seemingly innocuous carriers. • Steganography make information seem “invisible” • Cryptography make encrypted message may draw suspicion(unreadable) while an invisible message will not.

  8. Demonstrate idea of Information Hiding.

  9. Conclusion the Idea of Information Hiding. • Idea of Information Hiding

  10. Reference • http://www.webopedia.com/TERM/C/cryptography.html • http://en.wikipedia.org/wiki/Steganography • Jonathan Cummins, Patrick Diskin, Samuel Lau and Robert Parlett, School of Computer Science, The University of Birmingham.“Steganography And Digital Watermarking” • Neil F. Johnson 1995-2007, http://www.jjtc.com/stegdoc/sec101.html

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