Ключевые слова: alarm, apartment, authorization, authorization code, building, business, buy, code, concept, copy, cube, entering, estate, family, guarantee, guard, home, home security, house, key, loan, lock, mortgage, nobody, online, online security, padlock, password, privacy, property, protect, protection, real, real estate, rent, safe, safeguard, safety, sale, secure, secured, security, smart, smart house, space, system, top, unlock, wood, wooden,