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中文摘要：
随着嵌入式技术的发展，嵌入式实时多任务操作系统已经被广泛使用，因为其安全性关系到整个信息系统，若处理不当可能引起系统的崩溃，因此很有必要研究其安全性。针对嵌入式实时多任务操作系统的安全性提出2点改进：调度策略的改进；软件分层。实践表明这2个方法能很好地保护系统的安全。当然，每个系统都有其固有的安全缺陷，这就需要在实践中不断摸索和积累经验。最后以Linux操作系统为例具体分析如何提高其安全性。
英文摘要：
With the development of embedded technology,ROTS has been used spreadly. Because its security is related to the whole information system,if handled improperly may cause the collapse of system, so it is necessary to research its security. two improvements about the security of RTOS are put forward in this paper： one is the improvement of scheduling, the other is software layered. Practice shows that these two methods can protect the system very well. Of course,each system has inherent security flaws, this requires exploring and accumulating experience gradually in practice. Finally, takes Linux operation system as example to analyze how to improve its secutity.
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