Is there a risk of theft of smart keys and "relay attacks" like cars that are being adopted on motorcycles?

What is the "relay attack" that is a problem with four wheels in the first place?

Popular 125cc bike, Honda Super Cub C125 smart key

It is now common sense for riders to register for crime prevention, take out theft insurance, and use various crime prevention goods to prevent their precious car from being stolen. [18 images] From 125cc scooters to 1000cc supersports, even though the photos explain the bikes that use smart keys, vehicle theft is decreasing in Japan as a whole. According to the materials of the National Police Agency, the number of car thefts in 2020 was 5210 in total for two-wheeled and four-wheeled vehicles, and the arrest rate was 57.7%. By the way, the number of thefts in 2002 was 62,673 and the arrest rate was 20.4%, and in 2010 it was 23,970 and the arrest rate was 35.2%, so the number of vehicle thefts is decreasing at a fairly high pace. It is thought that this was mainly due to the fact that the standard equipment of anti-theft devices has progressed, although it is simple for four-wheeled vehicles, and that the immobilizer has become widespread regardless of whether it is two-wheeled or four-wheeled. In addition, users may have become more aware of crime prevention. The number of cases of "theft with a key" that is stolen by leaving the key on has decreased significantly from 20,204 in 2002 to 1,307 in 2020, demonstrating the heightened user awareness. ing.

Nonetheless, the movement of thieves has become more sophisticated and commercialized, such as exporting stolen cars overseas, and new means have been born. The hot topic in the four-wheel industry is "CAN Invader", and whether the vehicle is controlled by legitimate means by invading CAN (Control Area Network) that connects the vehicle control system using a dedicated device. It pretends to steal the car. This is a method unique to the electronic control era, in addition to the "code grabber" that creates a duplicate key from the smart key signal, and the "relay" that unlocks and starts the engine by amplifying the smart key signal. Techniques such as "attack" are also known. Smart keys are not uncommon in four-wheeled vehicles nowadays, and many drivers are taking measures to counter such theft methods, such as putting the smart key in a case that blocks radio waves when not in use.