Techniques for protection of data-communication networks

Multiplex communications – Pathfinding or routing – Switching a message which includes an address header

Reexamination Certificate

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C370S392000, C370S466000, C709S231000

Reexamination Certificate

active

06901075

ABSTRACT:
Systems and methods for transmitting data between origin and destination networks are provided. Data complying with a first protocol is received at a front end of the origin network. At least one protocol layer of the first protocol is stripped from the received data such that only a portion of the received data is selected for transmission to a front end of the destination network. The selected data is transmitted to the front end of the at least one destination network using a second protocol different from the first protocol. The selected data can be transmitted over the at least one destination network using a third protocol different from the second protocol. Techniques for electrically isolating the origin and destination networks are also provided.

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Stephen Saunders,Putting a Lock on Corporate Data, Data Communications, vol. 25, No. 1, Jan. 1996, pp. 78 and 80.
Norbert Pohlmann,Gegen Den Grossen Lauschangriff, Elektrotechnik, vol. 79, No. 12, Dec. 15, 1997, pp. 76-80.

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