Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2007-02-13
2007-02-13
Vu, Kim (Department: 2135)
Cryptography
Video cryptography
Video electric signal modification
C380S204000
Reexamination Certificate
active
09664992
ABSTRACT:
A method and system for transferring information using an encryption mode indicator (EMI). The present invention provides several secure information communication modes in which data (e.g., representing an audio/visual work) can be transmitted from a source device to a sink device (receiving station) in a number of secure modes. In one secure mode, EMI mode A, the information of the transmission is not allowed to be copied as a whole work; this is the highest level of copy protection. In second secure mode, EMI mode B, the information of the transmission is allowed to be copied once and once only by the sink device. In a third transmission mode, no encryption is used and free copying is available.
REFERENCES:
patent: 4598288 (1986-07-01), Yarbrough et al.
patent: 5070528 (1991-12-01), Hawe et al.
patent: 5457746 (1995-10-01), Dolphin
patent: 5634012 (1997-05-01), Stefik et al.
patent: 5761302 (1998-06-01), Park
patent: 5825891 (1998-10-01), Levesque et al.
patent: 5828653 (1998-10-01), Goss
patent: 5845283 (1998-12-01), Williams et al.
patent: 5898784 (1999-04-01), Kirby et al.
patent: 5920627 (1999-07-01), Mionet et al.
patent: 5937066 (1999-08-01), Gennaro et al.
patent: 6028932 (2000-02-01), Park
patent: 6047103 (2000-04-01), Yamauchi et al.
patent: 6058476 (2000-05-01), Matsuzaki et al.
patent: 6223285 (2001-04-01), Komuro et al.
patent: 6618549 (2003-09-01), Kato et al.
patent: 0 618 723 (1994-10-01), None
patent: 0 691 787 (1996-01-01), None
patent: 0 763 936 (1997-03-01), None
patent: 0 766 466 (1997-04-01), None
patent: 0 878 794 (1998-11-01), None
patent: WO97/21279 (1997-06-01), None
Asano Tomoyuki
Komuro Teroyoshi
Osawa Yoshitomo
Shima Hisato
Sony Corporation
Sony Electronics Inc.
Truong T. B.
Vu Kim
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