Method for activating and executing protected functions in a communication system
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United States of America Patent
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Jan 26, 1999
Grant Date -
N/A
app pub date -
Dec 30, 1996
filing date -
Dec 28, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
In a communication system having a function or performance feature to be protected, the periodic transmission of encoded interrogation information is initiated by a security routine to ensure that the function or performance feature is protected. The protected function is activated and further-executed only if reply information which is also encoded is received from a connected crypto-unit in a predetermined time span after a transmission of the interrogation information.
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