Detection and deterrence of counterfeiting of two-sided documents

Abstract

A method and apparatus is described for detection and deterrence of counterfeiting that permits one to make legitimate copies without introducing substantial visual artifacts or experiencing substantial processing delays by imposing a small, random, offset or jitter into the position upon a page where printing of a copy of a document begins. The jitter makes it extremely unlikely that the registration icons align when the secure document is copied. The misalignment of the icons signal that the copy is a counterfeit. In one implementation, the jitter is always introduced and, in another implementation, jitter is only introduced when counterfeiting is possible, or likely.

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