基于AES和DES算法的可重构S盒硬件实现

密码芯片的可重构性不仅可以提高安全性，而且可以提高芯片适应性．S盒是很多密码算法中的重要部件，其可重构性对密码芯片的可重构性有重大影响．文章在分析AES和DES算法中S盒硬件实现方法的基础上，利用硬件复用和重构的概念和相关技术，提出了一种可重构S盒（RC-S）结构及其实现方法．实验结果表明RC-S可用于AES算法和DES的硬件实现．基于RC-S的AES、DES密码模块规模分别是AES、DES模块的0．81／1．13，性能分别是DES／AES的0．79／0．94．

Hardware Implementation of a Reconfigurable S-box Based on AES and DES Algorithm

The reconfiguration can improve not only the security but also the adaptability of the cipher chip.S-boxes are important components.In many cryptographic algorithms, its reconfiguration has great influence on the reconfiguration of the cipher chip.In this paper,the hardware implementation of the S-boxes of AES and DES algorithm is analyzed,and the structure and the implementation of a reconfigurable S-box (RC-S) are given.The result of the RC-S experiment proves that the RC-S can be used in the hardware implementation of AES and DES algorithm.The size of the AES/DES cipher module based on RC-S is 81%and113% of the AES and DES cipher chip respectively,and the performance is 79%and94% of the AES/DES cipher chip respectively.