Аннотация:
The work is devoted to
solving the problem of improving the efficiency of transmission of confidential information by
public channels by way developing new and modifying existing steganographic methods and
algorithms that are resistant to perturbation by reducing the sensitivity of the task of creating stego.
The new steganographic method that provides complete recovery of confidential information in the
presence of significant perturbation, which is based on the principle of expanding the spectrum of
additional information to the cover data spectrum is developed. Further development got the method
of reducing of sensitivity of stego, which created by existing steganographic methods, at the
expense of decreasing conditionality number of a task of decoding of confidential information. Its
application allowed to increase efficiency of decoding steganographic methods based on use of least
significant bit of the cover on the average on 35%. Further development got the general approach to
the analysis of a state and technology of functioning of information systems that gave the chance to
increase stability of some existing steganographic algorithms by their modification and to carry out
the analysis of their stability. Stability to perturbations of new modifications exceeds stability of
basic algorithm on the average on 30%.
