Patent ID: 7173517

Claim:
A vehicle security system comprising: a driving-device start unit that is portable, includes an ID code, and capable of starting, by transmitting an ID code, a driving device of a vehicle that is prohibited from being started; an ID-code reception unit that receives an ID code from the driving-device start unit; a base station that transmits a prohibition instruction for requiring a start prohibition that prohibits the driving device from being started; an instruction reception unit that receives the prohibition instruction transmitted by the base station; and a control unit that executes the start prohibition based on the prohibition instruction received by the instruction reception unit and releases the start prohibition so as to enable the driving device to be started, based on the ID code received by the ID-code reception unit, wherein, when the base station transmits the prohibition instruction, the base station transmits a given ID code for releasing the start prohibition, and wherein, when the instruction reception unit receives the prohibition instruction and the given ID code transmitted by the base station, the control unit prohibits the driving device being started by other than a driving-device start unit having the given ID code.