Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Reexamination Certificate
2006-06-27
2006-06-27
Urban, Edward F. (Department: 2685)
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
C455S518000, C455S519000, C455S550100, C380S260000, C380S270000, C380S274000
Reexamination Certificate
active
07069031
ABSTRACT:
A method and apparatus for providing security in a group communication network provides for receiving an encryption key, encrypting media for transmission to a controller using the received encryption key, the encrypted media being directed to another communication device, and communicating the encrypted media to the controller. In one embodiment, the communicating includes wireless communication. The method and apparatus further provides for receiving encrypted media from a controller and blocking the encrypted media if the communication device is not enabled to receive encrypted-media transmission, or if the media is not encrypted based on an encryption key previously specified by the communication device. In another aspect, the communication device is a push-to-talk (PTT) device.
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TR45; Data Service Options for Spread Spectrum Systems: Async Data and Fax Services; Mar. 1999.
Crockett Douglas M.
Maggenti Mark
Rosen Eric
Ciccozzi John L.
Nguyen Thuan
O'Connell Robert J.
Qualcomm Inc.
Urban Edward F.
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