06304973 is referenced by 322 patents and cites 28 patents.

A network prevents unauthorized users from gaining access to confidential information. The network has various workstations and servers connected by a common medium and through a router to the Internet. The network has two major components, a Network Security Center (NSC) and security network interface cards or devices. The NSC is an administrative workstation through which the network security officer manages the network as a whole as well as the individual security devices. The security devices are interposed, between each of workstation, including the NSC, and the common medium and operate at a network layer (layer 3) of the protocol hierarchy. The network allows trusted users to access outside information, including the Internet, while stopping outside attackers at their point of entry. At the same time, the network limits an unauthorized insider to information defined in their particular security profile. The user may select which virtual network to access at any given time. The result is trusted access to multiple secure Virtual Private Networks (VPN), all from a single desktop machine.

Title
Multi-level security network system
Application Number
9/129879
Publication Number
6304973 (B1)
Application Date
August 6, 1998
Publication Date
October 16, 2001
Inventor
Timothy C Williams
Chantilly
VA, US
Agent
Jacobson Holman PLLC
US
Assignee
Cryptek Secure Communications
VA, US
IPC
G06F 12/14
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