METHOD FOR UNIT CODING OF M MESSAGE REPRESENTED IN BINARY FORM Russian patent published in 2012 - IPC G09C1/00 H04L9/00 

FIELD: electricity.

SUBSTANCE: method of unit coding of a message M represented in a binary form includes the following sequence of actions: generation of a secret key in the form of a set of subkeys K, Q₁, Q₂,…Q_u. R₁, R₂…,R_h, where h≥1, breakdown of the message into subunits M₁ M₂,…,M_U; M_u+1, M_u+2,…,M_2u;…; M_iu+1 M_iu+2,…,M_(i+1)u;…; M_(w._1)u+1,…, M_wu, where i=1, 2,…, w, u≥1 and w≥1, formation of data units B_i, where i=1, 2,…, w, by generation of additional messages T⁽¹⁾, T⁽²⁾,…, T^(h) , breakdown of messages T^(j) where j=1, 2,…, h, into subunits T₁ ⁽ⁱ⁾ T₂ ^(j)…T_w ^(j), coding of subunits M_(i-1)u+1 M_(i-1)u+2,… M_jU depending on subkeys Q₁ Q₂,…, Q_U, coding of subunits T_i ⁽¹⁾, T_i ⁽²⁾,…, T_i ^(h) depending on subkeys R₁ R₂,…,Rh and combination of transformed subunits M_(i-1)u+1 M_(i-1)u+2,…, M_iu, T_i ⁽¹⁾, T_i ⁽²⁾,…, T_j ^(h), and coding of data units B_i depending on a subkey K.

EFFECT: increased information capacitance of a cryptogram without reduction in its resistance level.

3 cl, 1 ex