Study Of Key Technology On Security Access Control Of UC/OS-Ⅱ

Embedded systems which are here and there are becoming a more and more important part in people's life. With the development of computer technology and network, more and more embedded devices can communicate through internet. Computing resource can be shared beyond the limit of time and space. Information security becomes a critical problem. People extracted experience from the research on general operating system that securing system radically must begin with research on secure operating system. Embedded operating system is as the kernel and foundation of system as general operating system. Embedded operating system is the root of securing embedded system. Ever since long time PCs and embedded operating systems used abroad at home are all directly introduced from abroad. The security of operating systems from abroad is hard to trust. Developing general operating systems and embedded operating systems of independent copyright is urgent requirement of home information industry. This dissertation is devoted to this subject.The object of this paper is to enhance access control function module of embedded operating system kernel uC/OS-II and integrate the two parts without seam. Study of access control model is the key problem in the study of secure OS. This paper detailedly analyzes, compares current techniques of access control in general operating system, and analyzes uC/OS-II in detail as well.From the perspective of security requirements and design principles, by GFAC framework we implement two security policies on the base of uC/OS-II, including HRU model based fine grain discretionary access control and multi-level security policy based...