Based on the character of the vector processing and the proper arithmetic algorithm, modular addition and subtraction, modular multiplication, modular inversion reconfigurable cipher processing units are presented in the paper. 本文根据专用指令设计的要求,结合向量处理的特点,选择了合适的有限域运算算法,对模加减、模乘、模逆等功能单元进行了可重构设计。