Ключевые слова: access, accessibility, authentication, authority, authorized, card, card key, code, control, door, electronic, enter, entrance, entry, hand, home, hotel, identification, indoors, inserting, intruder, key, key card, key code, keyhole, lock, modern, nobody, open, pass, plastic, precaution, privacy, protect, protection, room, safeguard, safety, secure, security, service, system, technology, unlock, validation,