Authenticating the source of digital media is performed by using unique, randomly generated variably encoded frequency patterns to create mastering specific, profiles for sets end user media which can be verified by a manufacturer. A method for verifying the authenticity of an optical storage device...http://www.google.fr/patents/US8051291?utm_source=gb-gplus-shareBrevet US8051291 - Unique block header patterns for media verification
Unique block header patterns for media verification
