System for authenticating remotely generated optical control signals
US8171290B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2009 |
| Grant date | May 1, 2012 |
| Priority date | — |
| Expiry date | Jun 15, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/84
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An authentication system authenticates remotely generated optical control signals. A remote optical emitter transmits an optical control signal from a remote location. A remote authentication device collocated with the remote optical emitter receives an authentication challenge signal and transmits a compatible authentication response signal. A control optical signal processor positioned at a first location receives the optical control signal from the remote optical emitter and generates a control output signal in response to detection of a valid optical control signal. An authentication device is coupled by a real time data communications link with the optical signal processor and with the remote optical emitter. The control authentication device receives the control output signal from the optical processor, transmits the authentication challenge signal to the remote authentication device in response to receipt of the control output signal and generates an authenticated control output signal in response to receipt of a valid authentication response signal from the remote authentication device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.