Ключевые слова: access, actions, admission, allowance, array, attaches, authorization, ban, block, blocking, caution, concept, danger, error, failure, hacker attack, hexagon, inability, inaccessibility, inadmissibility, inconsistency, integrity, invasion, lack, limit, no, other, penetration, problems, prohibition, red, refusal, restricted, restriction, rules, security, shapes, situation, space, suspicious, symbol, system, taboo, temporary, threat, violation, virus, warning, wrong, zone,