Research of modified method of coding in sub-bands of monochrome image

Author(s):  A.D. Bukhantsov, candidate of Sciences, associate Professor, Belgorod National Research University, Belgorod, Russia,

I.V. Druzhkova, Belgorod National Research University, Belgorod, Russia,

Issue:  Volume 45, №2

Rubric:  Infocommunication technologies

Annotation:  Currently, the task of reliable protection of information fr om unauthorized access through steganography is relevant in connection with the variability of requirements and the growth of opportunities for hacking. The use of images as containers in stenographic coding is due to the redundancy of such containers. Non-formatting encoding methodsuse image properties and its use inevitably leads to distortions introduced by steganographic system, but at the same time they are more resistant. In this article, we consider the modi-fication of non-formatting method of steganography: the encoding in the sub-bands of the image, wh ere the information is bit-coded in the image, including the limited sub-band of the stack container, using a limited number of its coefficients, the choice of which obeys the implemented algorithm. This implemen-tation of the research method in comparison with the method of the spread spectrum, in which the infor-mation message is bit by bit modulated by multiplying by an ensemble of orthogonal signals.

Keywords:  steganography, image, subband analysis, spreading method.

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