| abstract |
A process for producing a document, document, especially valuable and / or security document, A process and device for verifying the authenticity of a document The present invention relates to a process for producing a document (1) wherein in a plurality of layers (15, 17, 19) of the document (1) image information is respectively inserted so that the image information is completed to form a complete image. image information in at least two of the layers (15, 17, 19) contains digital watermark information (25, 27, 29), and only the digital watermark information set (25, 27 , 29) in at least two layers (15, 17, 19) is a security feature for a document identification (1). The present invention further relates to a corresponding document (1), a method for identification (37), and a device for identification. |