Ключевые слова: assurance, background, blue, computer security, concept, concepts, countermeasure, defense, food security, graphic, highway, illustration, insurance, management, measure, measures, national security, network security, physical security, protect, protection, public security, risk, road, safe, safety, secure, secured, security, service, sign, sign post, signpost, signs, sky, square, straight ahead, strategic, strategies, strategy, symbol, symbolism, symbols, threat, traffic, vulnerability, wallpaper, way,