Patent ID: 6809636
Filing Date: 2004-10-26
Classification: B60R

Abstract:
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.