METHOD OF ENCRYPTING BINARY DATA UNIT Russian patent published in 2015 - IPC H04L9/00 G09C1/00 

FIELD: radio engineering, communication.

SUBSTANCE: method of encrypting a binary data (M) unit comprises generating a secret key which includes subkeys Q and R, generating an auxiliary n-bit unit of binary data T, generating an in-bit auxiliary cryptogram C_M by performing, over M, a block encryption E operation depending on Q using the formula C_M=E_Q(M), generating an n-bit auxiliary cryptogram C_T by performing, over T, a block encryption E operation depending on R using the formula C_T=E_R(T), generating a cryptogram C depending on the secret key and the auxiliary cryptograms C_M and C_T, characterised by that subkey Q is generated in the form of a 2n-bit line which is a concatenation of two n-bit binary numbers q₁ and q₂, the subkey R is generated in the form of a 2n-bit line which is a concatenation of two n-bit binary numbers r₁ and r₂, generating a (n+1)-bit binary number p and generating a cryptogram C in the form of a concatenation of two multi-bit binary numbers C₁ and C₂, which are the solution of a system of two linear equations q₁C₁+q₂C₂=C_M mod p and r₁C₁+r₂C₂=C_T mod p with two unknowns C₁ and C₂.

EFFECT: higher level of security of encrypted information.

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