关键词: 微控制器, 存储安全机制, 加解密算法, 总线控制器, 双轨逻辑

Abstract: A high-reliability MCU（Micro Controller Unit） for security control is proposed, by the analysis of attack means and protective measure on traditional microcontroller. The architecture includes a new program loading method and uses DES（Data Encryption Standard） algorithm which is achieved by hardware circuit to encrypt and decrypt program. Improved traditional microcontroller internal structures, joined the bus controller, the design realizes temporary data security storage. Dual-rail logic circuit is used to design key module in backend design. This MCU establishes a high reliable storage security mechanism and can resist physical attacks and bypass attack effectively. The simulation results show that the function of the micro controller is right and the layout can be manufactured and verified.

Key words: Micro Controller Unit（MCU）, secure storage mechanism, Data Encryption Standard（DES）, bus controller, dual-rail logic