Re: Well the more complex u make it the more likely it will mess up
Security wise, we are moving towards two factor for computer systems, yet we are moving away from it for cars.
Cars had great two factor for years - aftermarket alarm and a physical car key, or immo and key, etc.
I have four factor on my van - two different physical keys as well as two electronic. (Yes, I would add face recognition or something if there were a decent way.) Yet it still won't stop someone determined enough.
A friend of mine gave a talk at Bsides London called "How I steal cars" - it's all very technical and expensive, but nearly anything with wheels we locksmiths can walk up to and take away now. And the newer stuff is easier! Manufacturers who literally refuse to believe we can clone it means they won't patch, & just a radio signal - no physical key - so it can be very fast.