Secure fire/security/sensor transmitter system
US5408217A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 21, 1994 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | Mar 21, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/10
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system for preventing unauthorized access to the programming and control features of a fire/security/control systems remote sensors. The exemplary embodiment of the present invention utilizes an association of transmitter identity/address with a central processor/control fire/security data base, which in turn is configured to securely program each transmitter with its location and function, or "personality". The various, individual sensors and central processor/control unit communicate individually via individual, repeatable pseudo randomization algorithms, producing a several bit result. The communicating central processor/control and each sensor must have a match on outgoing/incoming code before the transmitting sensor will accept the programming on its personality. The exemplary embodiment of the present invention also utilizes a randomization seed, which can altered occasionally, to further increase security.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.