Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2006-05-16
2006-05-16
Smithers, Matthew (Department: 2137)
Cryptography
Video cryptography
Video electric signal modification
C380S232000, C380S250000, C713S176000, C713S179000
Reexamination Certificate
active
07046807
ABSTRACT:
Data administration method which prevents the infringement of a copyright by encrypting and distributing digital content, and readily grasps which contents are contained in the digital content included in the data. Preparing symbol information symbolized so as to visually and auditorily recognize the contents of the digital content that conduct distribution (Step S12), embedding the symbol information in a header data section (Step S13), encrypting the digital content (Step S15), embedding consent information including the information on the contents key in the header data section as an electronic watermark (Step S16), and compositing the real data section and the consent-information-added header data section and distributing the composite data (Step S17).
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Office Action issued Nov. 22, 2005 for corresponding Japanese Application.
Hashimoto Shinji
Hattori Eiki
Hirano Hideyuki
Mochizuki Shigetoshi
Fields Courtney
Fujitsu Limited
Smithers Matthew
Staas & Halsey , LLP
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