Reconfigurable Design and Implementation of Data Extraction and Permutation facing Stream Cipher Algorithm

摘要

For design of a class of stream cipher algorithm reconfigurable coprocessor, it is necessary to realize efficient and flexible distribution between the initial chaos source generator and nonlinear transformation unit. From the analysis, it can be seen that the data distribution should have any data extraction and repeatable permutation characteristics. In this paper, design of data distribution network's main circuit based on Inverse Butterfly network and Crossbar network is presented. And an algorithm of control information generation is given. By analysis and comparison with other realization ways, this design can save 16% hardware resources.