METHOD FOR FORMING ENCRYPTION/DECRYPTION KEYS Russian patent published in 2023 - IPC H04L9/00 

FIELD: cryptography.

SUBSTANCE: method for generating encryption/decryption keys, which provides for the simultaneous formation of a network and two pair keys for a communication network consisting of three correspondents, includes the formation of the original and correlated sequences on the side of the first correspondent, as well as preliminary, basic, decoded and corrected sequences on the sides of the second and third correspondents of the communication network, encoding the original and basic sequences, extracting blocks of test symbols from them and simultaneously transmitting these blocks over communication channels without errors, forming decoded sequences on the sides of the second and third correspondents and corrected sequences on the side of the first correspondent; compressible basic sequences are formed on the side of the first correspondent and compressible corrected sequences on the sides of the second and third correspondents, a hashing function of sequences is formed on the side of the first correspondent, it is transmitted over direct communication channels without errors, and simultaneously a network and two pair keys are formed on the sides of all correspondents by hashing the original, decoded, compressible basic and compressible corrected sequences according to the generated sequence hashing function.

EFFECT: providing the possibility of generating encryption/decryption keys, providing, in addition to the network secure information exchange between correspondents of the communication network, a paired secure information exchange

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