Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1993-07-01
1994-10-18
Gregory, Bernarr E.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 9, 380 20, 380 43, 380 49, H04L 900
Patent
active
053575717
ABSTRACT:
In a secure communication system, a secure point-to-point communication may be accomplished in the following manner. A first communications unit receives a request from an operator for a point-to-point communication identifying at least one destination communication unit. In response, the first communication unit generates a private call key variable by modifying an encryption key variable through the use of a predetermined function. Identity of the encryption key variable and information pertaining to the predetermined function is transmitted by the first communication unit to the destination communication unit. Upon receiving the identity of the encryption key variable and information pertaining to the predetermined function, the destination communication unit generates the private call key variable. When the private call key variable has been determined by the first communication unit and the destination communication unit, both communication units can engage in the secure point-to-point communication.
REFERENCES:
patent: 4182933 (1980-01-01), Rosenblum
patent: 5204901 (1993-04-01), Hershey et al.
Gregory Bernarr E.
Markison Timothy W.
Motorola Inc.
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