Secure satellite over-the-air rekeying method and system

Details Secure satellite over-the-air rekeying method and system Secure satellite over-the-air rekeying method and system

1988-12-27

1991-02-12

Tarcza, Thomas H.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 33, 34082534, 342352, H04L 900, H04K 110

Patent

active

049930672

ABSTRACT:
A secure satellite over-the-air rekeying method and system are shown. This system provides a geometric filter for allowing message input to a satellite from ground stations having a particular predefined geographic location. Messages transmitted from an allowable ground site having a proper location are received and processed. Messages from improper geographic ground stations are discarded by the system. The messages include over-the-air rekeying information. The secure satellite over-the-air rekeying method includes ground station transmissions to the satellite to be rekeyed. The satellite receives these transmissions from the ground station system. The satellite determines whether the geometric position of the ground station corresponds to a predetermined allowable position. If the position is an allowable one, the satellite system processes the received information and rekeys the satellite.

REFERENCES:
patent: 4688250 (1987-08-01), Corrington et al.
patent: 4860352 (1989-08-01), Laurance et al.

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