Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2008-04-08
2008-04-08
Zia, Syed A. (Department: 2131)
Cryptography
Video cryptography
Video electric signal modification
C380S200000, C380S239000, C380S230000, C380S231000, C705S052000
Reexamination Certificate
active
10398702
ABSTRACT:
A method of transmitting a content to a reception side includes the steps of encrypting the content by use of a scramble key that varies with time, encrypting scramble-key-associated information that includes at least the scramble key and usage-control information, the usage-control information indicative of usage of the content on the reception side, and transmitting the encrypted content and the encrypted scramble-key-associated information to the reception side.
REFERENCES:
patent: 5627657 (1997-05-01), Park
patent: 6714649 (2004-03-01), Masuda et al.
patent: 7073073 (2006-07-01), Nonaka et al.
patent: 7099479 (2006-08-01), Ishibashi et al.
patent: 7110542 (2006-09-01), Tripathy
patent: 7269445 (2007-09-01), Natsuno et al.
patent: 2004/0052379 (2004-03-01), Nishimoto et al.
patent: 1 118 931 (2001-07-01), None
patent: 99241 (1997-01-01), None
patent: 2000196479 (2000-07-01), None
patent: 2000295202 (2000-10-01), None
patent: 20011128130 (2001-05-01), None
English Translation of JP 2001-128130 A Matsuura Satoshi, et al. “Method and Device for Data Generation and Transmisstion . . . ” (Matsushita Denki Sangyo KK).
English Translation of JP 2000-295202 Sakurai Atsunori “Limited Reception System” (Matsushita Denki Sangyo KK).
English Translation of JP 09009241 A “Scramble Broadcasting System, Scrambling Method, Scrambling Device and Descrambling Device” Yamashita Masami, et al. (Sony KK).
English Translation of JP 2000-196479 A “Digital Broadcasting System, Control Method for Digital Stream and Terminal Equiptment” Shimizu Takao, et al. (KK Tokyo Hoso).
Menezes, A., et al. “Handbook of Applied Cryptography.” CRC Press LLC. USA (1997) pp. 551-553.
Kurioka Tatsuya
Namba Seiichi
Nishimoto Yusei
Okuda Haruo
Uehara Toshihiro
Ladas and Parry LLP
Nippon Hoso Kyokai
Zia Syed A.
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