数据加密技术在嵌入式系统中的应用

摘要

在装备的试用状态管理和敏感数据保护等方面,数据加密技术的应用越来越广泛.针对嵌入式系统的特点和数据加密需求,给出了一种可应用到嵌入式系统的数据加密算法.该方法在随机数序列的基础上实现数据加密,并综合应用了数据二次寻址、置换表、数据字节运算、改进的循环冗余校验等技术,相同明文每次加密后形成的密文数据各不相同,具有加密强度高、算法容易实现、密文数据防篡改等特点.该技术已成功应用于C8051F020和MSP430F135单片机系统,分别实现了某两型装备的试用期状态管理和敏感数据保护.%Data encryption technologies has been widely applied to the probation state management and important data protection of equipment. Aiming at the characteristic of embedded system and its requirements on data encryption, a data encryption arithmetic which can be applied to the embedded systems is introduced. Data addressing, data replacement table, data byte operation and other technologies are being adopted in the data encryption method. The method mentioned above has been used in the C8051F020 and MSP430F135 embedded systems, and realized the probation state management and important data protection of equipments. It can also be applied to other embedded systems easily.