Secure access point for scada devices
US8176532B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 2003 |
| Grant date | May 8, 2012 |
| Priority date | — |
| Expiry date | Sep 10, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A programmable control unit interacts with a physical system. The physical system has a public network interface for communicating with remote computer systems. A user computer system is located remotely from the programmable control unit. A front-end security gateway is located remotely from the programmable control unit, wherein the front-end security gateway communicates with the user computer system to authenticate and authorize a user for access to the programmable control unit. The front-end security gateway forwards messages between the user computer system and the programmable control unit after the user is authenticated and authorized. A public communication network is coupled between the front-end security gateway and the programmable control unit to carry the forwarded messages. The public communication network includes a routing control configured to allow communication with the programmable control unit only by the front-end security gateway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.