单片机控制程序加密策略探索与应用  

Exploration and application of encryption policy about control program of MCU

作　　者：潘永雄[1] 胡敏强 李小伟[1] 

机构地区：[1]广东工业大学物理与光电工程学院,广东广州510006 [2]广州市杜高精密机电有限公司,广东广州510385

出　　处：《计算机工程与设计》2010年第11期2466-2469,共4页Computer Engineering and Design

摘　　要：在分析单片机应用系统控制程序传统加密原理与局限性基础上,依据单片机芯片新增硬件功能,提出了基于芯片身份识别码、片内RC振荡器频率离散性、上电标志等多种单片机控制程序的加密策略。阐述了这3种加密方式的加密原理,给出了完整的加密操作与判别流程。这3种加密方式不占用单片机芯片的硬件资源,代码短,加大了控制程序的破解难度,有效地提高了MCU片内控制程序代码的安全性。The principle and limitation of the traditional encryption about application program of MCU is analyzed briefly.In terms of new hardware function of MCU,it proffers a variety of encryption policies about application program of MCU based on unique serial number of chip,frequence discreteness of inside RC oscillator,flag of power on reset,etc.The principle of work about three encryption modes is described,the integral encryption operation and discrimination flowchart are put forward.These encryption modes don’t occupy the hardware resource because of the short program code,increase the decryption difficulty and enhance the security of inside code of MCU efficiently.

关 键 词：单片机 应用程序 加密技术 芯片身份识别码 频率离散性 解密技术 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]