Ключевые слова: background, blackboard, board, business, chalk, chalkboard, classified, close, confidential, confidentiality, data, document, file, folder, forbidden, government, graphic, grunge, grungy, icon, illustration, important, imprint, information, ink, internet, isolated, key, letter, lock, military, office, open, paper, paperwork, password, privacy, private, protect, red, report, restricted, rubber, safe, safety, seal, secrecy, secret, secure, security, sign, spy, stamp, success, symbol, text, title, top, top secret,