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IBM : developerWorks : Security : Education - online courses
Introduction to cryptology: Pt. 3
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Steganography and watermarking
 1. What is steganography?
 2. What is watermarking?
 3. Watermarking vs. signatures
 4. Problems with watermarking, part 1
 5. Problems with watermarking, part 2
 6. Digital steganography using images
 7. Digital steganography using other formats, part 1
 8. Digital steganography using other formats, part 2
 9. Digital steganography using other formats, part 3
 10. Cryptanalysis of digital steganography, part 1
 11. Cryptanalysis of digital steganography, part 2
 12. Cryptanalysis of digital steganography, part 3
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