Electrical computers and digital processing systems: support – Data processing protection using cryptography – By stored data protection
Reexamination Certificate
2006-10-24
2006-10-24
Sheikh, Ayaz (Department: 2136)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
By stored data protection
C713S189000
Reexamination Certificate
active
07127619
ABSTRACT:
An encryption arrangement for multiple encryption of television programs. A system according to embodiments of the present invention multiple encrypts only a portion of the data required for full presentation of a television program to permit coexistence of multiple conditional access encryption systems associated with multiple manufacturer's set-top boxes within a single system. By only encrypting a portion of the program, dramatically less bandwidth is consumed than the alternative of multiple encryption of all program data, thus permitting a larger number of programs to be carried over the same bandwidth while permitting coexistence of multiple conditional access systems in a single cable television system.
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Candelore Brant L.
Pedlow, Jr. Leo M.
Unger Robert Allan
Miller Jerry A.
Miller Patent Services
Sheikh Ayaz
Shiferaw Eleni
Sony Electronics Inc.
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