Cryptography – Communication system using cryptography – Wireless communication
Reexamination Certificate
2005-04-19
2005-04-19
Morse, Gregory (Department: 2134)
Cryptography
Communication system using cryptography
Wireless communication
C340S005640, C348S734000, C380S270000, C380S277000, C725S025000
Reexamination Certificate
active
06882729
ABSTRACT:
A data system includes a secured appliance capable of receiving broadcast programming and a remote control used to transmit data frames to the secured appliance. The secured appliance is provided with a decryption key that is complimentary to an encryption key provided to the remote control. The encryption key is used to encrypt at least a part of a data frame transmitted by the remote control to the secured appliance, the data frame including data for commanding an operation of the secured appliance. The remote control cannot be used to command certain operations of the secured appliance until such time as the decryption key is supplied to the secured appliance thus effectively limiting the ability to use the secured appliance to access the broadcast programming.
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Arling Paul D.
Chambers Christopher Alan
Hayes Patrick H.
Scott Wayne
Jarosik Gary R.
Morse Gregory
Universal Electronics Inc.
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