RASTERIZATION OF WEB DOCUMENTS AND THE USE OF ITS CHARACTERISTICS FOR STEGANOGRAPHIC COPYRIGHT PROTECTION OF ELECTRONIC CONTENT

UDC 004.56+003.26

  • Saveleva Margarita Gennadievna – PhD student, the Department of Information Systems and Technologies. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: saveleva@belstu.by

  • Urbanovich Pavel Pavlovich – DSc (Engineering), Professor, Professor, the Department of Information Systems and Technologies. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: p.urbanovich@belstu.by

DOI: https://doi.org/10.52065/2520-6141-2023-266-1-10

Keywords: steganography, copyright, deposition, rasterization.

For citation: Saveleva M. G., Urbanovich P. P. Rasterization of web documents and the use of its characteristics for steganographic copyright protection of electronic content. Proceedings of BSTU, issue 3, Physics and Mathematics. Informatics, 2023, no. 1 (266), pp. 54–63. DOI: https://doi.org/10.52065/2520-6141-2023-266-1-10.

Abstract

An electronic document container, protected from unauthorized use or modification based on steganography can initially be created both on the basis of raster and vector graphics. At the same time, the original content can be converted from the formats of one graphic to another. When conversion or transformation of the text container-documents, one of the important problems is the text rasterization: the contours of the letters begin to blur, the color along the contour turns into a gradient. However, it is possible to use this circumstance to embed secret information (digital watermark) into the protected content. To increase the bandwidth of the secret channel created in this way, you can use the prevailing shades among the transitional shades of rasterized characters. The article describes and analyzes the results characterizing the distribution of pixels that make up a certain container document by the frequency of occurrence of various shades of grayscale when converting PDF documents to PNG format. This can be used as the most important input information for the development of stenographic methods for protecting electronic content from unauthorized use or modification (copyright protection). The choice of the appropriate color shade for the placement of secret information allows you to increase the bandwidth of the secret steganographic channel, reduce the effectiveness of visual or other attacks on the steganocontainer.

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28.11.2022