Industrial Automatic Control Systems and Controllers Annotation << Back Information Security of Open Channels of Project Documentation V.A. Bulanov, T.M. Volosatova, N.V. Chichvarin In work the state-of-the-art review of methods of information security for systems of the automated design is carried out. Opportunity and conditions of application of methods of quantum cryptography and a steganography are considered. Restrictions of the existing information security methods of the steganography are considered. Original methods of steganography concealment of the project documentation produced in CAD/PLM/PDM are offered and described: holographic on the basis of digital Fourier hologram, a correlation method on the basis of calculation of convolution when determining correlation function and the method applying artifi cial defocusing. Comparison of characteristics of the offered combined methods and known steganographymethods of information security is carried out. It is shown that the combined steganography methods allow to provide rather effectively information security at data transmission on communication channels and can be used for protection of a trade secret in systems of processing and storage of project documentation. Keywords: safety; protection; information; cryptography; unauthorized access; object design; project documentation; steganography. Contacts: E-mail: vladimir_bulanov@mail.ru, E-mail: tamaravol@gmail.com, E-mail: genrih.gertz@gmail.com Pp. 56-64.