Network security bridge and associated method

Details Network security bridge and associated method Network security bridge and associated method

1995-03-28

1996-08-20

Gregory, Bernarr E.

Cryptography

Key management

Having particular key generator

380 4, 380 9, 380 23, 380 25, H04L 900

Patent

active

055486495

ABSTRACT:
A network local security bridge and corresponding method for bridging a first side of a network and a second side of the network. The first side includes local secure zone host devices within a local secure zone established by the network local security bridge. The second side includes remote secure zone host devices within remote secure zones established by network remote security bridges. The network local security bridge processes a first side data packet received from the first side of the network and a second side data packet received from the second side of the network. In doing so, the network local security bridge encrypts the data frame of the first side data packet when its source and destination addresses respectively specify one of the local secure zone host devices and one of the remote secure zone host devices and leaves the data frame of the first side data packet unchanged when its source and destination addresses respectively specify one of the local secure zone host devices and one of the unsecure host devices. In addition, the network local security bridge decrypts the data frame of the second side data packet when its source and destination addresses respectively specify one of the remote secure zone host devices and one of the local secure zone host devices and leaves the data frame of the second side data packet unchanged when its source and destination addresses respectively specify one of the unsecure host devices and one of the local secure zone host devices. It then transmits the processed first side data packet to the second side and the processed second side data packet to the first side.

REFERENCES:
patent: 4731841 (1988-03-01), Rosen et al.
patent: 4901348 (1990-02-01), Nichols et al.
patent: 4933971 (1990-06-01), Bestock et al.
patent: 5056140 (1991-10-01), Kimbell
patent: 5161192 (1992-11-01), Carter et al.
patent: 5268962 (1993-12-01), Abadi et al.
patent: 5386471 (1995-01-01), Bianco
patent: 5416842 (1995-05-01), Aziz

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