Operating systems belonging to the Linux family are somewhat more secure due to the limited access to system files. However, because unlimited access is created when logged in using the system administrator (root), it requires special encryption methods to keep some data confidential. According to the level of data confidentiality, only the GOST 28147-89 standard is a highly durable encryption algorithm. Research objectives organization of data protection in the operating system by encryption and archiving using the GOST 28147-89 algorithm, organization of encryption and decryption of system files during the initialization process, development of software for encryption of the operating system file system and evaluation of the efficiency of the graphics software package. The aim of the study is to develop special methods and algorithms, as well as algorithms based on national encryption algorithms that meet security requirements and meet the requirements of privacy standards. In the course of the study, information security methods, the theory of algorithms, mathematical methods, as well as ordered and object-oriented programming were used. The practical significance of the research results lies in the development of an information security system that meets the requirements of its own encryption algorithms GOST 28147-89 and can be used in government or commercial institutions related to the use of its findings by government and legal authorities to ensure the protection of confidential information. The implementation of the results of the study will ensure the transition to a more reasonable and targeted information security policy related to the use of user information systems and technologies in the ministries and departments of the Republic of Uzbekistan. The practical significance of the research results will ensure the transition to a more reasonable and targeted information security policy related to the use of user information systems and technologies in the ministries and departments of the Republic of Uzbekistan.