Why keys - they are heavy , easily lost, and is a total head ache; This generation need something more revolutionary. Electronic or virtual key . Simply use your smart phone, tablet or computer as a key, store unlimited keys , even unlock and lock doors from America or India, share it ,recover easily if lost or make a hybrid key like ( mechanical + electrical )!! technology simplified. If you are interested take the idea and develop it. I can help you with designing and programming.