Method and apparatus for location-sensitive decryption of an encrypted signal
作者： Michael D. Murphy
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摘要: A system for assuring the location integrity of a decryption chip used to receive and decrypt encrypted signals ES received from an signal source. The operates in association with licensed receiver is use at selected site or Li positioned adjacent Satellite Positioning System (SATPS) antenna receiver/processor that determine present L this antenna. If SATPS-determined within region R(Li;di), centered having diameter di, if associated channel authorized reception by receiver, enabled, decrypted audible visual display on receiver. Otherwise, does not incoming ES. can be changed group channels which receipt changed. This operate television other similar signals. SATPS may Global (GPS) Orbiting Navigational (GLONASS), another suitable satellite-based determination system.
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