In terms of falsification, the weakest link of the documents is usually the photo used for identification. In recent years, criminals have devised a number of methods to modify and manipulate images. TrueFace, ANY Security Printing Company’s photo security solution based on mathematical principles, offers a high level of protection not just for document producers, but declares a war against different photo-counterfeiting procedures as well. The protection against altering the photo is based on a rather simple idea, and thanks to a so-called digital print, a code sequence is generated from the portrait of the document owner before personalisation using a generating algorithm. When the document is personalised, this code sequence is printed on the card in a single step along with the other data in an encrypted form that is invisible to the naked eye. During the control, the information of the photo and the coded data can be compared and checked even in offline mode.