FIELD: cryptography.
SUBSTANCE: invention relates to secure information networks with quantum distribution of cryptographic keys. Method comprises (A) encoding a message in a processing unit of an output node of the k-th processing link, wherein: obtaining a quantum key with a long Xk bits; encoding a message on a quantum key of the k-th processing link using the selected encryption algorithm; sending the encrypted message to the processing unit of the input node of the k-th processing link; adding to received encrypted message key Xk, obtained in input unit of k-th processing link; generating value Yk depending on key length Xk; adding to received message Yk; Zk value is formed depending on selected encryption algorithm; adding to received message Zk, obtaining an input message for the next input node; if k<M, the input message is transmitted to the link output node k+1 processing unit through the digital data network; calculating k=k+1; obtaining an encrypted message in the processing unit of the input node of the k-th processing link through the digital data network; processing the encrypted message in the processing unit of the input node of the k-th processing link.
EFFECT: technical result is higher security of a transmitted message.
1 cl, 1 dwg
