27-07-2012, 02:41 PM
Digital Watermarking
Digital Watermarking.ppt (Size: 277.5 KB / Downloads: 41)
Big Brother Industries
He purchases licenses to listen the mp3s he has downloaded
He also owns the latest SDMI mp3 player
SDMI?
Secure Digital Music Initiative
Who: Conglomerate of world-wide recording, consumer electronic, and information technology corporations
Purpose: To design and implement a copyright protection scheme for music
How: Digital Watermarking
Breakin’ the Law
Joe decides to hack and remove the watermark on Dave’s mp3 so his mp3 player will play the song
He uses the attacks described in a research paper released by Princeton’s professor Felton
Watermarking Applications
Applications include
Authentication and verification
Fingerprinting
Ownership Assertion
Content labeling
Usage Control
Fingerprinting
Imperceptible watermarks used to label content for identification purposes
If content is copied and improperly used, the watermark can be viewed and the source of the copying can be found
If Joe Wahoo distributes music with his watermark embedded, any authority with the watermark directory can track him down
Content Labeling
Involves using watermarks to carry and deliver data on the media they are embedded within
Uses within databases and search engines
Advantage in that description of data is internally stored within file