Communication system and communication apparatus

Details Communication system and communication apparatus Communication system and communication apparatus

1996-12-30

1999-12-28

Le, Dieu-Minh T.

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Protection at a particular protocol layer

380 23, 709239, 707 9, G06F 1300

Patent

active

060095288

ABSTRACT:
A communication system includes a communication apparatus for connecting a first network to a second network, wherein a packet transmitted by a transmitting station in the first network by way of the communication apparatus to a receiving station in the second network is relayed selectively by the communication apparatus to the second network. First authentication information is created, in part, according to predetermined key information and the packet is transmitted with the header information thereof including the first authentication information. First authentication information in the header information of the packet is compared with second authentication information created, in part, according to predetermined key information, by the communication apparatus in order to determine whether or not the packet is to be relayed to the second network.

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