Vehicle immobiliser/alarm
First Claim
1. A security system including a security device arranged to exert control over a predetermined function, said security device being responsive to a coded key to exert control over said predetermined function, said coded key and said security device communicating using a data string of a predetermined format, wherein said data string includes a predetermined portion thereof having settable values, wherein said settable values when within a first predetermined range of values correspond to user codes assigned to user coded keys for said security device, and said settable values when within a second predetermined range of values correspond to supervisor codes assigned to supervisor coded keys for said security device, and said settable values when within a third predetermined range of values correspond to master codes assigned to master coded keys for said security device, wherein said security system includes programming means allowing said security device to be programmable to be responsive to one or more said supervisor coded keys and/or one or more said user coded keys, or one or more of said user coded keys only, wherein said supervisor coded keys have an intermediate level of access to said programming means between the level of access of said master coded keys and said user coded keys.
1 Assignment
0 Petitions
Accused Products
Abstract
A security system having security devices with hierarchical levels of access provided to coded keys which may be hand held transmitter units, is disclosed. The levels of access are master which is restricted to the manufacturer, seller and installer, supervisor which can be allocated to a site, and user which is usually specific to one security device only. The security devices can be programmed to be responsive to all of the supervisor coded keys and/or user coded keys, or a user coded key only. The security system can be used in a method of securing all vehicles at a car sales, where all of the vehicles can have their security devices programmed to be responsive to supervisor coded keys specific to the car sales site. When a vehicle is sold, its security device can be reprogrammed to be responsive to specific user coded keys only.
41 Citations
16 Claims
- 1. A security system including a security device arranged to exert control over a predetermined function, said security device being responsive to a coded key to exert control over said predetermined function, said coded key and said security device communicating using a data string of a predetermined format, wherein said data string includes a predetermined portion thereof having settable values, wherein said settable values when within a first predetermined range of values correspond to user codes assigned to user coded keys for said security device, and said settable values when within a second predetermined range of values correspond to supervisor codes assigned to supervisor coded keys for said security device, and said settable values when within a third predetermined range of values correspond to master codes assigned to master coded keys for said security device, wherein said security system includes programming means allowing said security device to be programmable to be responsive to one or more said supervisor coded keys and/or one or more said user coded keys, or one or more of said user coded keys only, wherein said supervisor coded keys have an intermediate level of access to said programming means between the level of access of said master coded keys and said user coded keys.
Specification