Secure front-end interface
US9094401B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 19, 2013 |
| Grant date | Jul 28, 2015 |
| Priority date | — |
| Expiry date | Jun 7, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/083
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A secure front-end interface for a PLC, RTU or similar device is disclosed. A first server is coupled to the PLC via a communications link and is configured to receive status information from the device and transmit the information to a second server via a one-way data link. The second server has a network interface for coupling to a network and receives the information from the first server via the one-way data link and outputs the information via the network interface based upon a user request. The front-end interface may further include a second one-way data link coupled from the second server to the first server to allow user command entry. The secure front-end interface may alternatively consist only of a single server coupled between the device and the network which requires a user to enter a password before obtaining access to the status information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.