APPLIANCE TO IMPLEMENT AN ASYMMETRIC ENCRYPTION ALGORITHM BY BLOCKS WITHOUT THE PROPERTY OF COMPLEMENTARITY.

摘要

AN IMPLEMENTATION OF A SAFETY ALGORITHM IS PROVIDED AS WELL AFTER THE COMPLEMENTARY WEAKNESSES PROVIDED FOR CONVENTIONAL IMPLEMENTATIONS. IN AN IMPLEMENTATION, A PROCESSOR (10) CRYPTOGRAPHIC APPLIES THE DES ALGORITHM TO A DATA BLOCK. THE PROCESSOR INCLUDES A FIRST PORT (14) OF ENTRY TO RECEIVE THE DATA BLOCK (X), A SECOND PORT (12) OF ENTRY TO RECEIVE A KEY (K) CRYPTOGRAPHIC, AND A PORT (15) OF OUTPUT TO PRODUCE THE OUTPUT BLOCK AFTER ENCRYPTED. A NON-LINEAR FUNCTION (20, 22, 24) THAT DOES NOT HAVE COMPLEMENTARITY IS APPLIED TO AT LEAST ONE OF THE PORTS. THE NON-LINEAR FUNCTION CAN INCLUDE A CONSULTATION TABLE, WHICH CAN BE ADVANTAGES DIRECTLY DERIVED FROM A DES S BOX.