Some months have passed during which I sort of failed to realize that I have been using two-factor authentication with my car.
The way that my car works, there is a key fob. If I have the key fob with me, I can walk up to the car and maybe it will permit me to get into the car.
A couple of months ago, the software in the car received an update. With the update, the car owner is invited to set up a PIN number. The idea is that when you walk up to the car, and you get into the car (using the key fob), this is not enough to be able to drive the car. In addition, you are invited to punch in a PIN number. Only then are you permitted to drive the car.
The idea is that a bad person might use a specialized radio receiver to figure out the signal from the key fob. Such a person might be tempted to try to steal the car. So with the PIN number, the bad person will not succeed.
It was some months before I realized this is really two-factor authentication.
I think the designer of this part of the software is worried about the possibility that the owner of the car might be absent-minded and might simply leave the key fob in the car. This would make things really very inviting for a car thief.
What do you think about key fobs for cars? What do you thing about two-factor authentication for cars? Please post a comment below.