The simple task of pressing a series of numbers into a metallic keypad situated at the gateway is a secure way to allow authorised friends, family or other “bonafide” visitors to enter through the electric gateway. They will not need to carry any keys or cards and thereby will not run the risk of losing them. They are tamperproof and have secondary data information circuit boards which are installed away from the keypad itself; this means they cannot be forced open and the wiring short-circuited to open the gates.