关键词: DES, FPGA, Verilog语言, C语言

Abstract: This paper introduces the basic principles of the DES encryption system，achieves the optimum FPGA reconstructing design on the DES with the help of giving the algorithm of DES encryption under the Verilog language and the C language conditions and the effective dealing with the key issues.Then it gives a new dynamic management design programme of the keys.Finally，the results of the design function simulation and test analysis show that the design of the whole thesis has higher practical significance and value.

Key words: Data Encryption Standard（DES）, FPGA, Verilog language, C language