The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 30, 1999
Filed:
Jun. 16, 1997
Charles S Williams, Cupertino, CA (US);
Cylink Corporation, Sunnyvale, CA (US);
Abstract
A hierarchical arrangement of security devices for securing a protected network through a plurality of security devices having security rules of descending strictness. The system includes a first security device between two networks, and a second security device coupled to the first security device. A frame is processed by the first security device if the first security device's security policy allows processing. If there is insufficient information for the first security device, the first security device passes the frame to the second security device for processing. Additional security devices may be added in a hierarchical chain as necessary or desired. Passing-off may also be prevented to provide multi-level security within a protected network.