| 摘要 |
An electronic security system for a vehicle in which a key 11 has electronic storage means 15 for storing coded information which can be detected upon approach or insertion of the key into a lock, or transmitted to the lock from a remote location, has code verification means 17, 18 for comparing the detected code with a lock code stored therein, data coupling means for transferring encrypted enable signals from a first part 17 of the said code verification mean via an optical wave guide 28 to a second part 18 thereof spatially separated therefrom and operable, when enabled, to allow the operation of one or more of the vehicles' essential or auxiliary electrically energised or controlled systems. Second part 18 sends encrypted signals to first part 17 via an optical wave guide 36 to change the encryption code for the next transmission. Presentation of a wrong key gives an alarm 37 and disables vehicle systems. <IMAGE> |
