Block encryption method for data encryption using Feistel networks

摘要

The input data is divided asymmetrically into function blocks of Feistel networks in dependence on input data block length. Rearrangement of the input data is performed in each Feistel round. The selection of the input data is mask controlled. The masking is conducted by logic AND interconnection with a configuration register (Reg) which contains exactly a required number of ones.