Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2011-04-12
2011-04-12
Brown, Christopher J (Department: 2439)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C726S026000, C725S008000
Reexamination Certificate
active
07925882
ABSTRACT:
Data application method enabling evaluations to be properly received while content is being protected, enabling content users to use only what they want to use in the amount they want to use it, and enabling advertising providers in certainty to have users use ads. The method includes: a step of converting first data for permitting use based on predetermined conditions, into encrypted first data by means of a predetermined encryption key; a step of generating watermarked second data in which the encryption key is embedded, as an invisible electronic watermark, into second data for permitting use unconditionally; and a step of compositing and distributing the encrypted first data and the watermarked second data.
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Brown Christopher J
Fujitsu Limited
Staas & Halsey , LLP
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