Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Central trusted authority provides computer authentication
Reexamination Certificate
2007-03-20
2007-03-20
Sheikh, Ayaz (Department: 2131)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Central trusted authority provides computer authentication
C713S193000, C713S194000, C714S736000, C714S746000, C365S185040, C365S200000, C380S265000, C380S044000, C326S037000, C326S038000, C326S039000
Reexamination Certificate
active
09992924
ABSTRACT:
A method for authorizing the rendering of a digital recording. A first section and a last section of a track is first identified. A watermark is then decoded from the first and last sections of the track. It is then determined if at least one reserved bit is marked in the watermark in each of the first and last sections of the track. If so, it is determined if the sequence IDs of sections interposed between the first and last sections of the track are in sequential order. If both conditions are met, the rendering is authorized.
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Chen Shin-Hon
Goodman Edward W.
Im Paul
Koninklijke Philips Electronics , N.V.
Sheikh Ayaz
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