Security Mechanism Based On Digital Signature For Applications On Linux Unified Kernel

The security of computer system comes to be an important development direction in the computer area. Especially, the operating system security has also caused wide concern.In the desktop operating system market, Windows and Linux system take the highest share. For this reason, the research work to make the two systems compatible also becomes an important development part in operating system. But in the application, each of the two systems has its own security problems, so that both of them may come out in compatible systems.The security problems in the desktop operating system are manifested that a intruder can get the permission to put some harmful programs into the system by some way, so that he or she will achieve his or her illegal object. This paper will introduce a security mechanism for the Linux Unified Kernel which is to run the Windows applications on Linux system. This mechanism concentrates on the applications, and uses the digital signature mechanism with some other assistant instruments. When a program is going to run, the kernel will check its signature to guarantee the running programs are legal. With this security mechanism, the researching and developing work of the Linux Unified Kernel project will provide a platform with more security and credibility for the future operating systems and their applications.The security mechanism which is introduced in this paper will combine both the characteristics of the applications on Windows and Linux system; verify the executable files and dynamic library files. Also, the mechanism will classify the programs by its importance for the rationality. All the work of the security mechanism will make best use of the Linux kernel codes, and defend the system with taking care of the efficiency.