> Like add unique and random differences in the metal on each key and have the key slot read those and only turn on the car if it matches So turn a $100 igniti

> Like add unique and random differences in the metal on each key and have the key slot read those and only turn on the car if it matches So turn a $100 ignition switch assembly into a $3,000 1-of-1 monstrosity? Would you need to replace the entire ignition assembly if you lose your keys, or would you be able to generate a key from the ignition assembly (or VIN or other unique identifier)? Thieves would probably just do that for high end vehicles anyway. > Or couldn’t the bumps on keys just be replaced by.. pretty much anything that is physically secure and not multiple hundreds of years old technology? Isn't this exactly what push-to-start tech is? I'm not sure the percentage of vehicles that have push-to-start at this point but I'd imagine it's well into the majority, and increasing.