The study course covers organizational and technological aspects related to cryptography and data security technologies. It provides the in-depth knowledge needed to protect corporate information resources through cryptographic technology. Basics of number theory, electronic signature, cryptography and cryptanalysis, digital forensics, steganography, privacy, cryptographic currency are considered. It provides an overview of data protection tasks and their solutions, substitution and permutation-based encryption algorithms, virtual private and wireless networks, their security protocols, authentication and authorization.