| 摘要 |
The invention relates to a digital security image, to be arranged on or in carrier, particularly a document, such as bonds or other documents the authenticity or origin of which is of importance, and having at least a first and second security characteristic visually almost imperceptibly incorporated in the digital security image, wherein the first security characteristic is detectably copied on a copy when copying the document and the second security characteristic is not copied onto said copy when copying the document, as well as a method for arranging and for detecting such a security element, as well as equipment for it. Additionally the invention relates to an image and an image in electronic form, provided with the security element according to the invention. |
