EPCBC密码算法的FPGA优化实现研究

摘要

In order to achieve small area implementation of encryption in resource-constrained smart cards, we studied the hardware optimal implementation of electronic product code block cipher(EPCBC) encryption algorithm. Firstly, each operation is accomplished only once, and the main program calls the 32 times to complete the encryption. Secondly, the same register is used in the S-box and key transformation so that the number of required registers is reduced. Thirdly, the cipher round operation and key update are put in the same module. Through field programmable gate array(FPGA) the experimental results show that the implementation area of EPCBC is greatly reduced, the optimization efficiency rate reaches 56%, and the encryption performance is not decreased so as to provide practical solutions for resource-constrained cryptographic smart cards.%针对资源约束的智能卡加密需要小面积实现的问题，对EPCBC加密算法从硬件上实现面积优化进行了如下研究：1)相同运算只实现一次，主程序调用32次完成加密；2)对S盒变换和密钥变换使用同一寄存器，从而节省寄存器数量；3)把密文轮操作和密钥更新放在一个模块中。通过FPGA优化结果表明，EPCBC密码算法实现面积大幅度减小，优化率达到56%，同时加密运算性能也没有降低，从而为开发受资源约束的智能卡密码硬件提供可行方案。