USING THE METHOD OF STEGANOGRAPHIC NOISE ANALYSIS TO IDENTIFY SIGNS OF DIGITAL PHOTO EDITING
Sergey V. Chornyy, Olha Brendel, A. Roman · Theory and Practice of Forensic Science and Criminalistics · 2019
In today’s world, digital technology has almost replaced analog, and in the materials of pre-trial and judicial proceedings used physical evidence in the form of electronic documents or their images, photographs, videos, scanned copies, having a digital nature of education. To date, the question of determining the authenticity and research installation of digital image pressing issues fototechnika examination. The main purpose of the study using the method of steganographic analysis of image noise is to determine the authenticity of digital photos, identify signs of changes in the «content» of such images. The possibilities of digital image research methods using the method of steganographic noise analysis to identify signs of editing digital photos (images) to improve the efficiency, quality and evidential significance of photographic examinations are considered. The proposed new methodical approach in solving problems for the study of the installation of digital images, or when establishing their veracity (authenticity). Developed under the methodology of the study of signs installation of digital images based on the analysis of entropy noise software allows you to conduct research to identify signs of installation on the basis of the analysis of entropy noise digital images by maximization of complex criterion that takes into account the entropy and the variance of the image. It can be used both on local computers, and with use of the powerful server equipment in the mode of remote access through the web interface, including, with use of low-power mobile terminals of the user (smartphones, tablets and so forth) that will considerably facilitate work of experts on research of installation of digital images or at establishment of their reliability (authenticity).