Ключевые слова: access, attack, background, black, blackboard, board, brush, brushstroke, chalk, chalkboard, compliance, concept, crack, crime, crossword, data, digital, drawing, education, encryption, game, identity, information, learn, learning, lesson, paint, paintbrush, policy, privacy, protect, protection, puzzle, quiz, safe, safety, school, secure, security, solution, study, success, system, teach, technology, text, texture, white, word,