(EN) The invention relates to a security element applied onto printing substrates (bank¬ notes securities product packagings identity cards/labels or other similar documents) by printing comprising a unique identifier as primary information visible to the naked eye and secondary information protecting against copying non visible to the naked eye. The unique identifier is typically a point code. Said secondary information is represented by a structure with the largest dimension of 2 to 40 microns and due to printing distortions arising when the security element is applied onto a printing substrate said secondary information is non reconstructable from the print of the security element and a statistically analyzable inherent feature is associated to it. The invention also relates to a printed matter with such an inventive security element and to a method to check authenticity of a printed matter with the inventive security element in visible light (380 750nm).
