Access control system and method using hierarchical arrangement of security devices
US5996077A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 16, 1997 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Jun 16, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/0823
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.