Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Security kernel or utility
Reexamination Certificate
2006-09-26
2006-09-26
Peeso, Thomas R. (Department: 2132)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Security kernel or utility
C713S165000, C713S166000, C713S152000, C713S152000
Reexamination Certificate
active
07114071
ABSTRACT:
A method and apparatus for adding watermark data to an input signal is provided. For this method watermark data is embedded into the input signal by modulating elements of the input signal to predefined relationships in reference to other elements of the input signal. By using referential relationships and by using patterned sequences, one or more bits of data can robustly be embedded. Further, a method and apparatus for recovering data embedded by the method and apparatus of the present invention, are also provided. To recover the embedded data, differences between elements of the input signal to reference elements of the signal are calculated and checked against predefined relationships. Predefined relationships thus found are used to recover pieces of the embedded information.
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patent: 6604072 (2003-08-01), Pitman et al.
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Craver et al., “Reading Between the Lines: Lessons from the SDMI Challenge,” Proceedings of the 10thUSENIX Security Symposium, Aug. 13, 2001, pp. 353-363.
Beaton Richard J.
Chmounk Dmitri V.
Goldberg Paul R.
Klotzbach Darrell P.
DTS Canada, ULC
Johnson William L.
Parsons Hsue & De Runtz LLP
Peeso Thomas R.
Welcher Blake A.
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