Steganography for Secure Digital Watermarking
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Transcript of Steganography for Secure Digital Watermarking
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Steganography for Secure Digital Watermarking
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Pratheepan Yogarajah, Dr. Joan Condell, Dr. Kevin Curran, Prof. Paul Mc Kevitt
University of Ulster, UK
Dr. Abbas CheddadUmea University, Sweden
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Steganography
Key
Encoder
Cover Image
Secret Data
Stego Object
Decoder
Secret Data
Communications Channel
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Secure Digital Watermarking
Cover Image
Secret Data
Protected Image
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Digital content authentication
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Sorry - this is NOT original.
Test image Original image
Original Image Attacked Image
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Secret Data Cover Image Stego Object
Self-Embedding
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How to detect alterations (1/2)
Final ResultGrayscale image of
Altered image
Altered image
Extracted grayscale
image
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Original image Extracted image
How to detect alterations (2/2)
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Self-Embedding - Temporal information
UU SDW:American Beauty-045/789+0
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Key Frames
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Temporal content change detection
Original Video Attacked Video
Detected Video
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Conclusion A steganography based self-embedding technique
provides a solution for digital content authentication. Benefits
- Protects commercial value of digital content- Protects the secrecy of digital content- Protects digital content from modification
Applicable fields: film/animation, TV, games, music, images
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Thank You
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Secret Data Cover Image Stego Object
Self-Embedding
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How to detect alterations (1/3)
Altered Document
Recovered Document
Grayscale image of Altered Document
Final Result
Altered Document
Recovered Document
Grayscale image of Altered Document
Altered Document
Recovered Document