Method for loading and utilizing a key in a secure transmission

Details Method for loading and utilizing a key in a secure transmission Method for loading and utilizing a key in a secure transmission

1993-03-26

1995-05-02

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 9, 380 44, 380 49, H04L 908, H04L 900

Patent

active

054127211

ABSTRACT:
An encryption code and at least one key are provided to a secure transmission device, via an external keying device, and stored in a volatile memory. A user code, entered via a keypad by a user, is received by the secure transmission device. An encrypted representation of the at least one key, based on the encryption code and the at least one key, is generated and stored in a non-volatile memory. Also, an encrypted representation of the encryption code and the user code, based on the user code, are generated and stored in the non-volatile memory. Upon power down of the secure transmission device, the at least one key and encryption code stored in the volatile memory are erased.

REFERENCES:
patent: 4418275 (1983-11-01), Oosterbaan et al.
patent: 4520232 (1985-05-01), Wilson
patent: 4797928 (1989-01-01), Dykes
patent: 4972472 (1990-11-01), Brown et al.
patent: 5008938 (1991-04-01), Freeburg et al.

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