FIELD: information protection.;SUBSTANCE: invention relates to key generation systems using quantum key distribution (hereinafter – QKD) technology for cryptographic information protection tools. A classic user key is generated in the first and last node of the QKD network of the reserved quantum route in the modules for generating user keys using preliminary keys according to the selected order of generating the classical user key. In the modules for generating user keys of the first and last nodes of the QKD network of the reserved quantum route, a user key is generated using the quantum user key and the classical user key according to the selected order of combining the quantum user key and the classical user key. The generated user key is transmitted from the module for generating user keys of the first and last nodes of the QKD network of the reserved quantum route to the modules for managing user keys of the first and last nodes of the QKD network of the reserved quantum route. The received user key is stored in the user key storage of the module for managing user keys of the QKD network node. The user key is transmitted from the user key storage of the module for managing user keys of the QKD network node to the user’s encoder that requested the user key.;EFFECT: technical result is an increase in the fault tolerance of the system due to the decentralized processing of user key requests and the calculation of quantum routes.;10 cl, 2 tbl, 2 dwg
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