Cryptographic key management method and apparatus

Details Cryptographic key management method and apparatus Cryptographic key management method and apparatus

1997-03-12

1998-07-28

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 2, 380 9, 380 28, 380 46, 380 49, H04L 908, H04L 928

Patent

active

057871736

ABSTRACT:
A system for the secure communication of a message from a transmitting user to a receiving user using a split key scheme. Each user generates a key component using a cryptographic engine. The key component is a pseudorandom sequence of bits with an appended error detection field which is mathematically calculated based on the pseudorandom sequence. This key component is then sent out on a communications channel from the transmitting user to the receiving user. The receiving user also sends its key component to the transmitting user. Each location performs a mathematical check on the key component received from the other location. If the key component checks pass at both locations, the transmit key component and the receive key component, including the error detection fields, are combined at both locations, forming identical complete keys at both locations. The identical complete keys are then used to initiate the cryptographic engines at both locations for subsequent encryption and decryption of messages between the two locations.

REFERENCES:
patent: 4417338 (1983-11-01), Davida
patent: 4649233 (1987-03-01), Bass et al.
patent: 4876716 (1989-10-01), Okamoto
patent: 4926475 (1990-05-01), Spiotta et al.
patent: 5150411 (1992-09-01), Maurer
patent: 5442703 (1995-08-01), Kim et al.

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