Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2005-03-08
2005-03-08
Elisca, Pierre (Department: 3621)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C705S057000, C380S201000, C380S054000
Reexamination Certificate
active
06865677
ABSTRACT:
To enable the control of rendering contents in part by using digital watermark technique:a contents serving center for embedding watermark in contents4embeds control information as digital watermarks within at least one of a plurality of blocks constituting electronic data by which contents are represented, thereby specifying the application of filtering to a part of the contents corresponding to the block; a contents distribution center1distributes the watermark-including contents to a receiving terminal2where checks the blocks of the received data to detect whether the control information as digital watermarks is embedded therein and applies the filtering to the block for which the embedded control information embedded has been detected in advance of reproducing the contents.
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Echizen Isao
Eikawa Shinobu
Harano Shinichiro
Sasaki Ryoichi
Yoshiura Hiroshi
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