Inventor
TAKASHIMA YOUICHI
JP13 patents
Patents
13 patentsUS6704431B1Mar 9, 2004
Method and apparatus for digital watermarking
NIPPON TELEGRAPH & TELEPHONE106 citations97
US5701343ADec 23, 1997
Method and system for digital information protection
NIPPON TELEGRAPH & TELEPHONE143 citations97
US7164778B1Jan 16, 2007
Digital watermark embedding method, digital watermark embedding apparatus, and storage medium storing a digital watermark embedding program
NIPPON TELEGRAPH & TELEPHONE53 citations96
US7072492B2Jul 4, 2006
Method and apparatus for digital watermarking
NIPPON TELEGRAPH & TELEPHONE48 citations96
US6769063B1Jul 27, 2004
Data converter and recording medium on which program for executing data conversion is recorded
NIPPON TELEGRAPH & TELEPHONE65 citations96
US6044463AMar 28, 2000
Method and system for message delivery utilizing zero knowledge interactive proof protocol
NIPPON TELEGRAPH & TELEPHONE57 citations95
US6011848AJan 4, 2000
Method and system for message delivery utilizing zero knowledge interactive proof protocol
NIPPON TELEGRAPH & TELEPHONE36 citations92
US7187769B1Mar 6, 2007
Method and apparatus for evaluating the strength of an encryption
NIPPON TELEGRAPH & TELEPHONE12 citations83
US7860270B2Dec 28, 2010
Digital watermark embedding method, digital watermark embedding apparatus, and storage medium storing a digital watermark embedding program
NIPPON TELEGRAPH & TELEPHONE4 citations73
US7817818B2Oct 19, 2010
Digital watermark embedding method, digital watermark embedding apparatus, and storage medium storing a digital watermark embedding program
NIPPON TELEGRAPH & TELEPHONE4 citations73
US7978877B2Jul 12, 2011
Digital watermark embedding method, digital watermark embedding apparatus, and storage medium storing a digital watermark embedding program
NIPPON TELEGRAPH & TELEPHONE1 citations62
US7792323B2Sep 7, 2010
Digital watermark embedding method, digital watermark embedding apparatus, and storage medium storing a digital watermark embedding program
NIPPON TELEGRAPH & TELEPHONE2 citations62
US7640431B2Dec 29, 2009
Method and apparatus for digital watermarking
NIPPON TELEGRAPH & TELEPHONE0 citations52