EVALUATION OF THE RESULTS OF SPATIAL CONVERSIONS OF BASIC BLOCKS OF CONTENT AS A SEPARATE STAGE OF A HYBRID STEGANOGRAPHIC ALGORITHM
Abstract
The work presents the results of modeling and analyzing the consequences of implementing procedures for changing the spatial orientation of basic blocks (BBs) of images extracted from an array of lengths series of BBs content. The purpose of this work is to determine the character of the influence and consequences of using various variants of spatial conversion of BBs of an image-content on its resistance to attacks and computational complexity. The conducted modeling demonstrated that spatial transformations of BBs of content, despite their low computational complexity and complete reversibility, provide an effective and independent level of protection. Integrating the appropriate procedures, in compatible with other levels (tools) of protection, significantly enhances the final effect, improving the robustness of steganographic content against attempts at unauthorized extraction. The evaluation of the computational complexity of spatial conversions of BBs of content confirmed the possibility of ensuring resource consensus when performing these procedures, even in conditions of a shortage of free resources used by hardware platforms. It was concluded that the wide combinatoriality of possible schemes for implementing spatial transformations of BBs is an effective and computationally «light» tool for countering attempts at unauthorized access to content. The results obtained confirm the prospects for applying the mechanism of changing the spatial orientation of BBs of content in low-resource algorithms for steganographic information protection and/or corresponding mobile applications. This opens up broad opportunities for further improvement of the considered concept of steganographic insertion image by expanding the combinatorics of the structure of the data extractor key, adaptive selection of processing parameters, and combining variants of spatial transformations of BBs of image content.
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