METHOD AND DEVICE FOR SPOOFING RESISTANT INFORMATION THROUGH COMMUNICATION CHANNELS Russian patent published in 2018 - IPC H04L9/06 G06F11/08 

FIELD: cryptography.

SUBSTANCE: invention relates to the field of cryptographic information protection. Information to be transmitted, represented as a symbol stream, enters the crypto code information converter, in which its preliminary processing is performed and the block ciphering procedure with non-linear bijective transformations is performed using iterative encryption keys. Based on the obtained encrypted sequence of ciphertext blocks, a verification sequence of data blocks is formed, which in turn is also subjected to the encryption procedure. Generated encrypted test sequence is combined with the information sequence of the ciphertext blocks and enters the communication channel. On the receiving side, the crypto code information converter from the received sequence makes the information sequence of the ciphertext blocks and the check sequence. Further, the received test sequence is deciphered. Resulting data block sequence and the received information sequence of the ciphertext blocks perform detection and, if necessary, recovery of the ciphertext blocks corrupted by the attacker. Corrected (recovered) information sequence of the ciphertext blocks is subjected to a block decryption procedure with nonlinear bijective transformations using iterative encryption keys, after which the flow of symbols of the received information is formed.

EFFECT: technical result is to increase the stability of the transmission of encrypted information to the deliberate imitating effects of the attacker.

4 cl, 6 dwg, 2 tbl