ITERATIVE METHOD FOR BLOCK ENCRYPTION Russian patent published in 2003 - IPC

FIELD: electric communications and computer engineering; cryptographic methods for data encryption. SUBSTANCE: method includes generation of private key, division of data block into two sub-blocks, and execution of R≥2 encryption rounds each including generation of binary vector and two control codes for first sub-block, conversion of binary vector, conversion of second sub-block with aid of first control operation depending on value of first control code, superposition of converted binary vector onto second sub-block by means of addition operation, and conversion of second sub-block with aid of control operation depending on value of second control code, two- station controlled operations being used as control operations. EFFECT: enhanced encryption speed. 4 cl, 2 dwg