But you have to communicate with the server and if you are outside of the door you can do it either through 3G (Internet) or WiFi. Which means if users WiFi pa

But you have to communicate with the server and if you are outside of the door you can do it either through 3G (Internet) or WiFi. Which means if users WiFi password is bad anyone can walk in or if your product isn't 100% solid the server can be attacked and security disabled.