Malafeyev Y. Methods and tool means for algorithmic maintenance obfuscation in systems of software protection

3. Object of research: the process of software security. Aim of research: increasing of the software and tool means security properties via development of structural-functional conversion methods of algorithmic process models. Research methods: methods and terms of the combinatorial analysis, Boolean algebra, set theory, the algorithmic algebras. Hardware: personal computer. Theoretical and practical results of the research: the obtained scientific results are the basis for the solution of the scientific-applied task of software security systems' obfuscation dynamic converters synthesis; the practical value of the research results is development of a new approach to increasing of software security via implementation of obfuscating conversions on the algorithmic level. Scientific novelty: first proposed is the method of structural-functional conversion of algorithmic process models, that is designated by conversion of the given algorithmic process model into an obfuscated one with a new structure and logical functions, which enables the complication of the program's static analyses; first proposed is the method of dynamic algorithmic converters building, that is designated by formation of algorithmic process obfuscation model, which enables the complication of the program's dynamic analyses; improved is the method of algorithmic converters' conversions enumeration, which covers a wider scope of conversions in comparison with the existing ones; functional conversions, which enables evaluation of conversions number and building of conversions catalogs necessary for algorithmic converters synthesis. The results of the dissertation have been implemented in the Public Joint-Stock Company "Joint-Stock Company Kharkov Scientific-Research Institute of Radio Measurements" and in State Enterprise "Kharkov Scientific-Research Institute of Machine Building Technology". Scientific and practical results of the dissertation can be used in scientific-research organizations and enterprises of Ukraine, that secure software at the stage of algorithmic means development".