面向一类序列密码算法的可重构数据分配网络设计与实现

摘要

基于前馈模型的序列密码算法主要由初始乱源发生器与非线性变换两部分组成,在对其进行可重构设计时,需要在这两者之间实现高效、灵活的数据分配.由分析可知,该数据分配应具有任意数据抽取和可重复置换的特性.提出基于Inverse Butterfly(反向蝶形)网络和基于Crossbar(交叉开关矩阵)网络的数据分配网络主体电路设计,并给出控制信息生成算法.经与其他实现方式分析比较,所提设计可以节省16%的硬件资源.%A class of stream cipher algorithm, based on the feed-forward model, mainly consists of two parts: the initial chaos source generator and the nonlinear transformation unit.For its reconfigurable coprocessor design, it is necessary to realize efficient and flexible distribution between two parts.From the analysis,it can be seen that the data distribution should have any data extraction and repeatable displacement characteristics.In this paper, the design of main circuit in the data distribution network is presented based on Inverse Butterfly network and Crossbar network and algorithm of control information generation is given.By analysis and comparison with other implementation, this design can save 16%hardware resources.