Electrical computers and digital processing systems: support – Data processing protection using cryptography – By stored data protection
Reexamination Certificate
2007-10-23
2007-10-23
Moazzami, Nasser (Department: 2136)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
By stored data protection
C713S189000
Reexamination Certificate
active
11474625
ABSTRACT:
A method of encoding a packetized digital television signal consistent with certain embodiments involves encrypting a portion of the packets containing the digital television signal according to a first encryption algorithm; encrypting the portion of the packets containing the digital television signal according to a second encryption algorithm; leaving a portion of the packets containing the digital television signal unencrypted; assigning a primary packet identifier to the unencrypted packets; assigning a primary packet identifier to the packets encrypted under the first encryption algorithm; and assigning a secondary packet identifier to the packets encrypted under the second encryption algorithm. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.
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Candelore Brant L.
Pedlow, Jr. Leo M.
Unger Robert Allan
Miller Jerry A.
Miller Patent Services
Moazzami Nasser
Shiferaw Eleni A.
Sony Electronics Inc.
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