FIELD: physics; communication.
SUBSTANCE: invention relates to electrical communication, and more specifically to transmission of encrypted formalised messages. The technical outcome is achieved due to that, in the device for encrypting and decrypting formalised messages with a hashing function, which includes transmission and reception units a digest is obtained in the transmission unit via iterative cryptogram hashing using the Winternitz method, where the digest corresponds to the cryptogram. The digest is linked to the cryptogram in the memory module of the cryptogram. The combination of the digest and the cryptogram is then transmitted over a direct communication channel. Further, in the reception unit the received digest is recorded into a digest selection unit. The digest which corresponds to the received cryptogram is then calculated through iterative hashing of units of the received cryptogram identical to the analogous process in the transmission unit. The obtained digest is then compared with the received digest. If the digests coincide, the received message is sent to the output of the device, otherwise a "query" signal is generated and sent to the transmitting unit over a return channel for repetition of the cryptogram in which an error or modification was detected.
EFFECT: increased reliability of transmitting formalised messages over transmission channels with noise and protection against falsified data entry protection.
3 dwg
