Protection of Documented Information from Falsification Based on Speckle Patterns

The article considers the protection of documented information based on random aperiodic structures. Speckle patterns formed by illuminating a diffuse surface with coherent radiation are proposed as random aperiodic structures. Experimental studies have been carried out on the formation of moiré patterns with various imposition of speckle patterns. It is shown that such moiré patterns can be used to protect and identify documented information.