Ponomarenko L. System of security against unapproved access on the basis of vocal autentification

The dissertation is devoted the questions of vocal authentification which does not depend on maintenance of text and to the organization on its basis of the system of protection fetch for realization of secret and controlled from distance authentification of users of the informative systems. For decision the problems are set, in the dissertation work the method of increase of authenticity of the system of secret and controlled from distance authentification person is developed after voice essence of which consists in the grounded choice of adaptive mathematical vehicle for description of entrance linguistic signal - wavelet-transformation and informing parameters is frequency of basic tone and parameter to the wavelet -portrait of phonemes, and also increase of exactness of determination of select informing parameters. The last is achieved the use of new mathematical models for the calculation of values of informing parameters, by the use of correcting parameters and increase of efficiency of the previous linguistic signal processing by its realization in obedience to the developed method of grounded organization of subsystem of the previous signal processing. Such approach to organization of the system of parameters of linguistic signal allowed to attain a 94,8% authenticity of authentification person after voice, that it was set an experimental way during the approbation of programmatic-vehicle complex of authentification person after voice, created on the basis of the mathematical models developed in work.