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US 6,307,937 B1Granted
Method and apparatus for an adapter card providing conditional access in a communication system
AssigneeHughes Electronics Corporation
InventorsDouglas M. Dillon, Robert D. Cassagnol
Life of this patent
Estimating the term…
Abstract
A method and apparatus for an adapter card, for use in a computer, to provide conditional access by the computer to incoming data streams while maintaining the security of information by maintaining a listing of addresses corresponding to data streams which the computer is authorized to receive, receiving and determining the address of a frame, determining whether the frame address matches an address maintained in an Access Table, and processing and transmitting only those frames of data streams which the computer is authorized to receive.
Claims4
An apparatus comprising:
- satellite data input means for inputting encrypted data from a satellite antenna;
- computer data input means for inputting encrypted data from a computer through an interface between said apparatus and the computer;
- decryption means for receiving the encrypted data from said satellite data input means and for outputting decrypted data obtained from the encrypted data to the computer through the interface, and for receiving the encrypted data from said computer data input means and for outputting decrypted data obtained from the encrypted data to the computer through the interface.
Dependencies are inferred from the claim text.