(EN) The invention relates to a security element applied onto printing substrates (bank not 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).
(ZH) 本发明涉及一种通过印刷加到印刷基板(银行券、有价证券、产品包装、身份证/标签或其它类似文件)上的安全单元，其包括：作为肉眼可见的初级信息的唯一标识符和肉眼不可见的防止复印的次级信息。所述唯一标识符通常为点码。所述次级信息由最大尺寸为2‑40微米的结构表示，由于在将所述安全单元加到印刷基板上时会产生印刷失真的问题，所以所述次级信息不可从所述安全单元的印刷内容重构，并且从统计学上可分析的固有特征与所述次级信息相关联。本发明还涉及一种具有本发明安全单元的印刷品和一种在可见光(380‑750nm)下利用本发明安全单元检验印刷品的真实性的方法。
