Apparatus and method for upgrading terminals to maintain a secur

Details Apparatus and method for upgrading terminals to maintain a secur Apparatus and method for upgrading terminals to maintain a secur

1990-11-16

1992-09-01

Gregory, Bermarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 2, 380 10, 380 21, 380 28, 380 43, 380 49, H04L 914, H04L 916, H04N 7167

Patent

active

051446642

ABSTRACT:
A secure communication network serves a plurality of terminals grouped into different security categories. Each terminal includes a replaceable security element containing a security algorithm specific to the security category to which the terminal is assigned. Upon the breach of a particular security version, the security elements in the affected category are replaced with new elements containing a different algorithm. The security elements are relatively low cost, and can be replaced on an as needed or periodic basis to maintain system security.

REFERENCES:
patent: 4613901 (1986-09-01), Gilhousen et al.
patent: 4716588 (1987-12-01), Thompson et al.
patent: 4799635 (1989-01-01), Nakagawa
patent: 4905280 (1990-02-01), Wiedemer
patent: 4910773 (1990-03-01), Hazard et al.

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