So my Idea in a short Read
The Key and Lock that we have at the moment is staying like it is because its supposed to be crap
Scanner Card. It opens all Doors in your House with that Card where the scanner is attached.
“The Handcode” The Guy who build it can give authority to people that they can use it dont requires any Key type Item.
So that my Rough explanation of it.
Thanks for Reading
Sry for my English