Security system and method therefor

Details Security system and method therefor Security system and method therefor

1996-03-22

1998-07-14

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

455 92, 34082572, 340 69, G06F 704, H04B 102, G08C 1900

Patent

active

057811210

ABSTRACT:
When an unlock switch 3 of a transmitter 1 is operated, a random number is generated. A transmitter-end CPU 6 conducts a calculation in accordance with a specified operational expression using the presently generated random number, and the calculation result is renewably stored in a transmitter-end storage 7. Then, an unlock data including an identification code, a calculation result code representative of the calculation result stored in the transmitter-end storage 7 before renewal, and a constant code representative of the presently generated random number is transmitted. On the other hand, in a receiver 11, a calculation is conducted in accordance with the same operational expressed as used in the transmitter 1 using the random number represented by the constant code of the presently received data, and the calculation result is renewably stored. If the identification code in the presently received data agrees with the identification code of a vehicle, the calculation result before renewal is compared with the calculation result represented by the calculation result code in the presently received data. If the calculation results agree, a door lock motor 18 is driven to unlock doors of the vehicle. The doors can be unlocked by a simple operation, and a vehicle theft can be prevented by a simple construction.

REFERENCES:
patent: 4596985 (1986-06-01), Bongard et al.
patent: 5103221 (1992-04-01), Memmola
patent: 5159329 (1992-10-01), Lindmayer et al.
patent: 5319364 (1994-06-01), Waraksa
patent: 5594429 (1997-01-01), Nakahara
Secure Remote Control System--by Jeffrey Wright and Mark Maiolani-p. 121, vol. 15, May 1992.

Affiliated with

Also associated with

Rating

Security system and method therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Security system and method therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Security system and method therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1886335