METHOD FOR FORMING ENCRYPTION/DECRYPTION KEY Russian patent published in 2022 - IPC H04L9/00 

FIELD: cryptography.

SUBSTANCE: invention relates to the field of cryptography. The method for generating the encryption/decryption key provides for the simultaneous formation of the initial sequence on the side of the second correspondent of the communication network and preliminary sequences on the sides of the first and third correspondents, encoding the initial sequence, extracting a block of verification characters from it, and simultaneously transmitting it over communication channels without errors to the first and third correspondents communication networks, simultaneous formation of decoded sequences by the first and third correspondents, formation of a hashing function for sequences by the first correspondent, simultaneous transmission of it over direct communication channels without errors to the second and third correspondents, and simultaneous generation of encryption/decryption keys by all correspondents of the communication network by hashing the original and decoded sequences according to the generated on the side the first correspondent of the sequence hashing function.

EFFECT: increasing resistance to compromise of the encryption/decryption key by the intruder.

9 cl, 50 dwg