Information security – Prevention of unauthorized use of data including prevention...
Reexamination Certificate
2009-04-22
2011-12-06
Pich, Ponnoreay (Department: 2435)
Information security
Prevention of unauthorized use of data including prevention...
C713S189000, C705S050000, C705S051000
Reexamination Certificate
active
08074285
ABSTRACT:
A method of protection against the copying of digital data stored on an information carrier envisages, on the basis of a first identification of an encryption of the digital data and of a second identification of a watermarking of digital data, the determination of a first mark if it has been possible to identify the encryption and the watermarking. A third identification of a type of the information carrier is followed by the determination of a second mark if it has been possible to determine the first mark and if has been possible to identify a determined type of information carrier. A fourth identification of cryptographic signature data accompanying the digital data is followed by the determination of a third mark if it has been possible to determine the second mark and if it has been possible to identify a cryptographic signature datum. A permission for digital copying of the digital data is delivered if it has been possible to determine the third mark.
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Chevreau Sylvain
Furon Teddy
Cooper Catherine A.
Opalach Joseph J.
Pich Ponnoreay
Shedd Robert D.
Thomson Licensing
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