Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Having particular address related cryptography
Reexamination Certificate
2007-06-13
2011-12-27
Song, Hosuk (Department: 2435)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Having particular address related cryptography
C713S169000, C713S170000, C380S200000, C380S201000
Reexamination Certificate
active
08086851
ABSTRACT:
A method of broadcasting a scrambled multimedia program, by way of a broadcast network, in which before transmitting a license key; a network head carries out a step of authenticating a terminal, and if the terminal has successfully authenticated, the network heads sends the terminal a license transmission message containing the license key or cryptogram of the license key, by way of a point-to-point link, and if the terminal is not successfully authenticated, the network head acts (at200) in such a way as to prevent the complete descrambling by this terminal of the scrambled multimedia program broadcast.
REFERENCES:
patent: 5029207 (1991-07-01), Gammie
patent: 6714649 (2004-03-01), Masuda et al.
patent: 2005/0182931 (2005-08-01), Robert et al.
Menezes, Vanstone, Oorschot; Handbook of Applied Cryptography, 1997, CRC Press LLC, pp. 551-553.
Carles Philippe
Chevallier Anthony
Dubroeucq Gilles
Lanfranchi Stéphane
Schulman, Esq. B. Aaron
Song Hosuk
Stites & Harbison PLLC
VIACCESS
Wright, Esq. Terry L.
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