What is blind image forensics?

As a technology to identify the authenticity and source of images without any pre-signature extraction or pre-embedded information, digital image blind forensics technology is gradually becoming a new research hotspot in the field of multimedia security, with broad application prospects. Firstly, the problems and tasks to be solved by image blind forensics technology are briefly described. According to the forensic characteristics used for image authentication, the blind forensic techniques for image authentication can be divided into three categories: blind forensic techniques based on the traces left by image forgery, blind forensic techniques based on the consistency of imaging equipment and blind forensic techniques based on the statistical characteristics of natural images. Then, the basic characteristics and typical methods of these three kinds of forensics technologies are expounded respectively, and the performance of different algorithms is compared and summarized. Finally, the main research achievements of scholars at home and abroad in the field of image blind forensics based on authenticity identification in recent years are summarized, and the existing problems and future research directions of image blind forensics technology are discussed.