Security using physical objects

摘要: A password-type security system may be employed using the placement of physical objects as a pattern that is to matched before access secured content granted. The implemented on computing uses display can detect, e.g., via optical circuitry, visual characteristics surface. visually detect objects, their orientations, locations, color, printed patterns, etc. user define comprising one or more placed at locations screen, predetermined rotation angle. outline shape an object treated required pattern, such permitted only if having detected Similarly, patterns also and used part patterns.