FIELD: information technology.
SUBSTANCE: invention relates to a system for recording digital data and displaying information content. The system for protecting content has a device for generating key data and a user terminal. The device for generating key data transforms the first key data, meant for using content, based on a preset transformation rule. While generating second key data, the device encrypts second key data using a device key, stored by a real terminal device, and outputs encrypted key data. The user terminal receives encrypted key data, decrypts the data using a device key, stored in the user terminal. While generating second key data, the terminal transforms second key data based on an inverse transformation rule, which corresponds to the transformation rule, while generating first key data, and uses content, using first key data.
EFFECT: protection of content by preventing unauthorised key reception.
30 cl, 16 dwg
