关键词: 可重构, 加密引擎, 网络安全, 现场可编程门阵列

Abstract: For a few problems，such as the weak security capability in encryption system of network security，the highly cost of development，and the weak ability of real-time processing，this article puts forward a design alternative of reconfigurable encryption engine based on FPGA.On the basis of the detailed exposition about the overall design structure of the encryption engine，it analyzes the key technology solution in FPGA implementation.Finally，experimental simulation shows that the engine can effectively improve the reconfigurable performance of FPGA，and reconfigurable resources performance ratio can be achieved to 0.78.So the engine on the future development of embedded security products has good speed and reconfigurable application prospects.

Key words: reconstruction, encryption engine, network security, Field-Programmable Gate Array（FPGA）