一种密钥可配置的DES加密算法的FPGA实现

在传统的DES加密算法的基础上,提出一种对密钥实行动态管理的硬件设计方案,给出了其FPGA实现方法。通过对DES加密原理的分析,利用其子密钥的生成与核心算法相关性较弱的特点,对密钥进行重新配置。DES算法采用资源优先方案,在轮函数内部设置流水线架构,提高了整体处理速度;在FPGA上实现轮函数和密钥变换函数独立运算,减少了相邻流水线级间的逻辑复杂度,从而实现了DES算法在FPGA条件下的重构设计。最终通过对设计结果的功能仿真和测试分析,论证了整个设计的正确性。

FPGA implementation of DES encryption arithmetic with dynamic key management

The thesis puts forward a hardware design scheme of dynamic key management based on the traditional DES encryption arithmetic. The scheme will re-configure the key based on the analysis of the principium of DES encryption and the weak relativity between the generation of sub-key and the critical arithmetic. The DES arithmetic adopts the methodology of preferential resources and sets up the pipelining architecture inside the round-function. Thus it can improve the speed of whole system. The thesis implements the operation of round-function and key-transform function based on the FPGA. This can reduce the logic complication of adjacent pipeline and implement the re -configuration design of DES arithmetic on FPGA. Finally, the thesis finishes the whole function simulation and test analysis based on the design, argument of the correction of the whole system.