Patent ID: 8473150

Claim:
A method of unlocking an anti-starting system of a computer controlling the operation of an engine of a motor vehicle, the method comprising: generating by the computer a first random value and writing of said value into a first zone of a volatile memory of the computer each time the computer is powered up; downloading of an unlocking program from a downloading tool to the volatile memory of the computer, and subsequently executing the unlocking program on the computer to calculate a second value from the first random value and from a determined relation stored in the unlocking program and to write the second value into a second zone of the volatile memory of the computer; reinitializing software of the computer without erasing the first and second zones of the volatile memory of the computer; comparing the values stored in the first and second zones of the volatile memory of the computer; and unlocking the anti-starting system of the computer when the comparison of the values stored in the first and second zones is successful.