嵌入式微处理器多协议ISP设计及安全性分析  

Design of Multi-protocol ISP and Its Safety Analysis for Embedded Microprocessor

作　　者：刘根贤[1,2] 汪东升[3] 王海霞[3] 

机构地区：[1]清华大学计算机科学与技术系,北京100084 [2]第二炮兵工程大学信息管理中心,陕西西安710025 [3]清华大学信息科学技术国家实验室(筹),北京100084

出　　处：《计算机技术与发展》2015年第8期20-23,28,共5页Computer Technology and Development

基　　金：国家自然科学基金资助项目(61303002;61373025);国家"863"高技术发展计划项目(2012AA0100905);清华信息科学与技术国家实验室(筹)学科交叉基金

摘　　要：ISP(In-System Programming,在系统可编程)指电路板上的微处理器可以通过预先设定的接口对内部FLASH存储器进行编程,而不需要从电路板取下器件。ISP技术已经得到广泛的应用,越来越多的微处理器支持用户自行设计ISP程序。但ISP存在升级方式单一的问题,还隐含一些安全风险,例如误触发擦写操作造成程序丢失,或者恶意ISP程序窃取敏感信息。针对这些问题,文中提出了多协议ISP设计,分析了ISP安全的硬件支持条件,并进行了相应评估,验证了多协议ISP以及安全设计的可行性。In-System Programming programs the inner FLASH of the microprocessor through a specific interface when the device is mounted on the circuit board. ISP technology has been used widely in microprocessors, some of which support users defined ISP firmware. However, ISP faces upgrading problems as well as security problems, such as the program loss caused by false trigger or the sensitive information missing caused by malicious ISP program attack. To solve those problems, a multi-protocol ISP technology is proposed. In addition, analyze and assess the hardware support requirements for ISP security and prove the feasibility of multi-protocol ISP and security design.

关 键 词：在系统可编程 微处理器 安全 多协议 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]