Method for activating and executing protected functions in a com

Details Method for activating and executing protected functions in a com Method for activating and executing protected functions in a com

1996-12-30

1999-01-26

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 2, 380 4, 380 9, 380 23, 380 49, 380 59, H04L 900

Patent

active

058646248

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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patent: 5526428 (1996-06-01), Arnold
patent: 5651068 (1997-07-01), Klemba et al.
patent: 5742683 (1998-04-01), Lee et al.
patent: 5748739 (1998-05-01), Press

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