UNIVERSAL APPROACH TO THE IDENTIFICATION OF STEGANOGRAPHIC TRANSFORMATION OF THE SPATIAL DOMAIN OF DIGITAL IMAGES
Keywords:
Steganalysis, Digital Image, Spatial DomainAbstract
The article proposes a universal approach to detect the presence of additional information attachments in the spatial domain of digital images. The approach is based on the use of the steganalytic method developed by the author earlier and based on the analysis of sequential triads of triplets in the matrix of unique colors of image. The steganoanalytic method Color Triads allows to detect with high accuracy the additional information attachments embedded by various steganographic methods into the spatial domain of images. The perturbations in the matrix of unique colors of images as a result of steganographic transformation are illustrated which concludes about the sensitivity of the blue color component even to small modifications of the brightness values of this matrix. The efficiency of detecting stegoes formed at small values of payload (0.4 bpp and less) based on LSB, S-UNIWARD, MiPOD and WOW steganographic methods is shown. The obtained results of computational experiments allow detect the filled color components of digital images with high accuracy even at payload of 0.1 and 0.05 bpp that is much higher than the results of modern analogues. The steganalytic method analyzes the spatial domain of images, which avoids the accumulation of computational errors that affect the detection result.
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