Importance

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Abstract

The present invention is related to a security element comprising, as an authentication and forgery-protection means, a 2-dimensional non-periodic, quasi-crystalline tiling, said tiling being embodied in the form of a material or a material modification in or on said element. The present invention is also related to a document comprising said security element, the use of said security element as an authentication and forgery-protection means for a document, as well as to a method protecting a document against forgery, comprising a step of embodying a 2-dimensional non-periodic, quasi-crystalline tiling, in the form of a material or a material modification in or on a security element comprised by said document. The present invention is also related to a method for authenticating a document carrying a 2-dimensional non-periodic, quasi-crystalline tiling as an authenticating feature, comprising a step of calculating the Fourier Transform of an acquired image of said document or article and comparing the discrete parts of said Fourier Transform with the discrete Fourier Transform of a 2-dimensional non-periodic, quasi-crystalline tiling serving as the authenticating feature, hereby deriving an authenticity indication.

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First Claim