Ключевые слова: background, bug, business, camera, cctv, code, design, emergency, eye, fingerprint, graphic, icon, illustration, key, line, linear, lock, logo, outline, padlock, password, police, protection, safe, safety, secure, security, serene, set, shield, shielding, sign, stop, surveillance, symbol, system, technology, thin, vaulted, warning, wire,