Abstract: A road toll system comprises a vehicle-mounted unit comprising a satellite navigation system implementing a position tracking function; transmitting means for transmitting position or route information to a remote server; and a unique identification device for attaching to the vehicle, and associated with the satellite navigation receiver. The road toll system function is enabled only when the identification device is present. The identification device comprises an electronic device which is adapted to alter by detachment or attempted detachment such as to prevent the road toll system function being enabled. This system increases the security of this type of system and makes fraudulent use of the system increasingly difficult.

Abstract: A road toll system comprises a vehicle-mounted unit comprising a satellite navigation system implementing a position tracking function; transmitting means for transmitting position or route information to a remote server; and a unique identification device for attaching to the vehicle, and associated with the satellite navigation receiver. The road toll system function is enabled only when the identification device is present. The identification device comprises an electronic device which is adapted to alter by detachment or attempted detachment such as to prevent the road toll system function being enabled. This system increases the security of this type of system and makes fraudulent use of the system increasingly difficult.

Abstract: A road toll system comprises a vehicle-mounted unit comprising a satellite navigation system implementing a position tracking function; transmitting means for transmitting position or route information to a remote server; and a unique identification device for attaching to the vehicle, and associated with the satellite navigation receiver. The road toll system function is enabled only when the identification device is present. The identification device comprises an electronic device which is adapted to alter by detachment or attempted detachment such as to prevent the road toll system function being enabled. This system increases the security of this type of system and makes fraudulent use of the system increasingly difficult.

Abstract: An electronic apparatus comprises a main apparatus portion, a unique identification device for attachment in close proximity to the main apparatus portion and an interrogation system provided as part of the main apparatus portion for wirelessly interrogating the identification device such that the main apparatus portion function is enabled only when in close proximity to the identification device. The identification device is adapted to be made disfunctional by detachment or attempted detachment. In this arrangement, the main apparatus portion is the normal electronic apparatus to be protected from theft. It is provided with an interrogation system so that it can be made to cease functioning if not in close proximity to the identification device.

Abstract: An electronic apparatus comprises a main apparatus portion, a unique identification device for attachment in close proximity to the main apparatus portion and an interrogation system provided as part of the main apparatus portion for wirelessly interrogating the identification device such that the main apparatus portion function is enabled only when in close proximity to the identification device. The identification device is adapted to be made disfunctional by detachment or attempted detachment. In this arrangement, the main apparatus portion is the normal electronic apparatus to be protected from theft. It is provided with an interrogation system so that it can be made to cease functioning if not in close proximity to the identification device.

Abstract: A road toll system comprises a vehicle-mounted unit comprising a satellite navigation system implementing a position tracking function; transmitting means for transmitting position or route information to a remote server; and a unique identification device for attaching to the vehicle, and associated with the satellite navigation receiver. The road toll system function is enabled only when the identification device is present. The identification device comprises an electronic device which is adapted to alter by detachment or attempted detachment such as to prevent the road toll system function being enabled. This system increases the security of this type of system and makes fraudulent use of the system increasingly difficult.