Importance

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Abstract

A system is disclosed including an authentication device as in the form of a document that is difficult to counterfeit and is individually identifiable. A sheet of medium comprising the document incorporates a section with a characteristic that specifically identifies the document as, for example, a section of varying translucency which will modulate a beam of light. Elements of such character identify the document as an individual unit. A visible mark or reference indicia on the document specifies the section of the document that serves to provide the characteristic identification. The visible mark is magnetic and records specific locations in the section and data on the document characteristic at such locations. An associated system is disclosed for producing and testing authenticator devices whereby the characteristic is sensed initially to be magnetically recorded in the mark and subsequently to be compared with the magnetically recorded data.

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First Claim