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

FIELD: electric communications and computer engineering. SUBSTANCE: proposed cryptographic method for data encryption includes generation of private key in the form of aggregate of sub-keys, division of data block into m≥2 sub-blocks B₁,B₂,...,B_m, and conversion of sub-blocks; sub-block B_j, where 1≤j≤m, is converted by converting at least one sub-key with aid of controlled operation depending on block B_h, where 1≤j≤m′ and h≠j, and superposing converted sub-key onto block B_j using two- position operation for the purpose. EFFECT: enhanced encryption speed. 3 cl, 2 dwg