To solve the problems such as low performance and high resource cost

which exist in current implementations of encryption algorithms based on reconfigurable computing technology

this paper presents a method that implements the encryption algorithms by using partial reconfiguration.This method implements a block cipher algorithm which has involutional structure by using module-based partial reconfiguration technology of Xilinx FPGA

and gives the solutions to the key technical issues such as cooperation between modules

communication channels design and timing adjusting scheme.The comparisons in the experimental results of this method with those of others demonstrate the effectiveness of this method.