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 Title: |
US5940002:
Security system with random number remote communication
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Finn, Alan M.; Amston, CT
Koopman, Jr., Philip J.; Pittsburgh, PA
Carroll, Roger D.; Burnsville, MN
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| Assignee: |
UT Automotive Dearborn, Inc., Dearborn, MI
other patents from UNITED TECHNOLOGIES AUTOMOTIVE, INC. (597540) (approx. 411)
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| Published / Filed: |
1999-08-17
/ 1997-10-10
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| Application Number: |
US1997000948743
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| IPC Code: |
Advanced:
B60R 25/00;
G07C 9/00;
H04L 9/32;
Core:
more...
IPC-7:
G08C 19/00;
H04L 9/00;
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| ECLA Code: |
B60R25/00; G07C9/00E2; H04L9/32;
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| U.S. Class: |
Current:
340/005.26;
340/005.64;
340/005.72;
340/825.69;
340/825.72;
380/042;
380/043;
380/044;
Original:
340/825.31;
340/825.69;
340/825.72;
340/825.34;
380/042;
380/043;
380/044;
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| Field of Search: |
340/825.31,825.34,825.69,825.72
180/287
307/10.2
380/042-46
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| Priority Number: |
| 1997-10-10 |
US1997000948743 |
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| Abstract: |
A security system that is useful for protecting vehicles from theft and buildings from unauthorized entry, for example, includes utilizing random numbers within remotely transmitted signals. A remote signaling device transmits a signal to a system controller with instructions for a desired operation of the system. The invention prevents a potential thief from capturing one or more transmitted signals and later mimicking or predicting a subsequent signal by including or utilizing a random number when generating the transmitted signal. The random number is incorporated into the transmitted signal in one of several ways according to this invention. Single-use or limited re-use of random numbers enhances the security and integrity of the system.
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| Attorney, Agent or Firm: |
Howard & Howard ;
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| Primary / Asst. Examiners: |
Cuchlinski, Jr., William A.; Beaulieu, Yonel
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| INPADOC Legal Status: |
Show legal status actions
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| Family: |
None
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First Claim:
Show all 18 claims |
What is claimed is:
1. A security system, comprising
- a remote signalling device including
- a switch that is actuatable to selectively activate said transmitter portion to transmit a remote signal from said signalling device,
- a remote memory module having a plurality of preselected random numbers that have no mathematical or algorithmic correlation,
- a message module that chooses one of said random numbers as said remote signal;
- a controller having a receiver portion that receives said remote signal from said signalling device, said controller including
- a control memory module having a plurality of preselected random numbers that have no mathematical or algorithmic correlation,
- a control module that receives said chosen random number from said received remote signal,
- a comparator module that compares said received random number with said plurality of random numbers in said control memory module; and
- an activation module that activates an appropriate portion of said security system responsive to said comparator module when said received chosen random number matches one of said plurality of random numbers in said control memory module.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 4 U.S. patent(s) that reference this one
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