Thieves do it, so it must be possible. I’ve lost the master key & remote to my ’02 Camry, have nothing but a valet key which will start the car. Toyota extorts HUNDREDS to make a chipped replacement key. I need to have some kind of spare that will start the car, otherwise I’m totally screwed if the valet key is lost. If I can just wire the iginition to bypass the security circuitry, a regular (unchipped) copy of the key should work.