FIELD: physics.
SUBSTANCE: invention relates to information protection. Complex employs a transport communication line connecting two encoders and two QKD system units. Channel for transmitting an QKD system consists of a service information service channel authenticated using quantum keys and quantum keys from the receiving system of the QKD system to the conjugate encoder and back, authenticated using the quantum keys of the user data transmission channel between the encoders, authenticated using quantum keys of channel of service information transmission and quantum keys from transmitting node of QKD system to conjugate encoder and back.
EFFECT: high security of transmitted user data, high reliability of the complex, high durability of quantum keys generated by the quantum key distribution system (QKD), due to authentication of QKD system service data on authentication keys formed from quantum keys, and authentication of service data of the QKD system as a whole, before breaking down into blocks used when transmitting over a digital communication line, and subsequent encryption of service data of the QKD system.
2 cl, 1 dwg
