Network message security method and apparatus

Details Network message security method and apparatus Network message security method and apparatus

1991-10-15

1993-01-05

Cangialosi, Salvatore

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 25, 380 49, H04L 900

Patent

active

051777886

ABSTRACT:
A security system for local area networks (LAN) to prevent eavesdropping of or to control access to LAN traffic at repeater or concentrator ports. The security system determines which repeater ports are to have security activated according to a given set of criteria. For ports with security activated, the contents of the data field of data frame transmitted from the repeater port to the local device are replaced with an arbitrary bit pattern.

REFERENCES:
patent: 4926481 (1990-05-01), Collins, Jr.
patent: 4979832 (1990-12-01), Ritter
patent: 5007088 (1991-04-01), Ooi et al.
Michael S. Katzman; "Smart from the Start;" LAN dispatch (an AT&T publication); pp. 22-23; Spring, 1991; United States.
Jonathon L. Howard; "Securing your LAN from Evesdroppers and Intruders;" LAN dispatch; pp. 24-28; Spring, 1991; U.S.

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