METHOD OF ENCRYPTING MESSAGES PRESENTED IN FORM OF MULTIBIT BINARY NUMBER Russian patent published in 2013 - IPC G09C1/00 H04L9/00 

FIELD: information technology.

SUBSTANCE: in the method for block encryption of a message M, which is presented in form of a multibit binary number, a private key and a cryptogram, which depends on the message M and the private key, are generated, wherein the private key is generated in form of a set of subkeys K₁, K₂,…, K_h, where h≥1, and auxiliary multibit binary numbers p₁, p₂,…, p_u, p_u+1, where u≥1; auxiliary multibit binary numbers R_1, R₂,…, R_u, D are generated and a cryptogram is generated in form of a multibit binary number C, which satisfies the comparison system C≡R₁ mod p₁, C≡R₂ mod p₂,…, C≡R_u mod p_u, C=D mod p_u+1, where at least one of the numbers R₁, R₂,…,R_u depends on the message M and one of the subkeys K₁, K₂,…, K_h.

EFFECT: higher stability of the cryptogram.

3 cl, 2 ex, 1 app