FIELD: data processing.
SUBSTANCE: invention relates to the field of digital data processing. Disclosed technical result is achieved by forming communication between RCD of user device and device for QKD (QKDD), wherein QKDD creates a quantum channel, which connects RCD with user devices, and RCD and user devices are connected using a data network; using QKDD to generate symmetric cryptographic keys, one of which is transmitted to a user device for storage in the keys registry, and second is transmitted to RCD, when receiving key on RCD, using central processor backup copy (BC) of its state is created, at which the state of its random-access memory is encrypted at a given time and transmission of the encrypted state for storage to the permanent data storage.
EFFECT: technical result is higher security of backup copies.
22 cl, 5 dwg
