1. Elnikov V. Cryptography from papyrus to computer. M.: ABF, 1997, p. 336
2. Zubanov F. WINDOWS NT-choice “pro”. M.: Publishing department “Russian Redaxia” LLP “Chanel Trading Ltd.”, 1996.
3. Barichev S. Cryptography without secrets. M.: “DIALOG-MEPHI”, 1995.
4. B Bobojonov A., Methodological aspects of business development of information products and services in Uzbekistan., TSU T: 2018 T: 2018
5. Odilov Sh.G. Mechanisms for improving the company's logistics processes on the basis of information and communication technologies., TDIU T: 2019