Secure fire/security/sensor transmitter system

Details Secure fire/security/sensor transmitter system Secure fire/security/sensor transmitter system

1994-03-21

1995-04-18

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340518, 34082569, 34082572, 34082522, 3408255, G08B 2900, G05B 1902

Patent

active

054082170

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.

REFERENCES:
patent: 4228424 (1980-10-01), Le Nay et al.
patent: 4465904 (1984-08-01), Gottsegen et al.
patent: 4535333 (1985-08-01), Twardowski
patent: 4581606 (1986-04-01), Mallory
patent: 4855713 (1989-08-01), Brunius
patent: 4972183 (1990-11-01), Kuhlmann et al.
patent: 5099233 (1992-03-01), Keenan
patent: 5259029 (1993-11-01), Duncan, Jr.

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