An important scientific and practical problem of ensuring effective detection of integrity violations of the digital images, regardless of the nature and strength of the disturbing influences, including in the conditions of minor and local disturbing influences has been solved by developing an appropriate scientifically-based methodology aimed at improving efficiency, informativeness and ensuring the universality of the examination of image integrity.
New scientific results are obtained, the main of which are as follows:
1. The general approach to detection the integrity violations of digital images was further developed, this made it possible to develop effective methods for separating images saved in lossy and lossless formats, as well as methods for identifying integrity violations as a result of minor disturbing influences, which ensured the universality of expertise.
2. The general approach to detection the integrity violations of digital images was improved; this made it possible to develop a method for detecting the block image processing, analogues of which were not found in open sources, as well as a method for detecting integrity violations as a result of minor disturbing influences, the efficiency of which exceeds modern analogues.
3. For the first time, a theoretical basis for detecting local integrity violations of digital images, in particular, with a small range of changes and under the conditions of additional disturbing influences, has been developed; this made it possible to develop effective methods for identifying the results of cloning and separation of the clone from the pre-image.
4. For the first time, the method for detecting integrity violations of the digital images has been developed; unlike existing ones, it provides the universality of the examination, while efficiency does not depend on the format (lossy/lossless) of the studied digital image.
5. For the first time, the universal methods for detecting integrity violations under conditions of minor disturbances have been developed; the effectiveness of the methods exceeds the efficiency of modern analogues in the conditions of specific disturbing influences, in particular when detecting LSB-embedded data.
6. For the first time, a scientifically-based methodology for the detection of integrity violations of the digital images has been developed, this made it possible to provide an effective examination of the integrity of digital images regardless of the nature and strength of the disturbance, including under conditions of minor and local disturbing influences.
The practical significance of the dissertation is to develop a set of methods and algorithms for the detection of integrity violations of the digital images, which can be used as components of information security systems of any institution, enterprise. All developed methods are polynomial degrees 2, and 4; and can be used to examine the integrity of digital video frames. The obtained scientific results are fundamental (theoretical) and applied (practical) for the development and improvement of information protection systems.
