Abstract: Traditionally, the Linux operating system makes use of different levels of security technologies, such as discretionary access control, mandatory access control, security audit, prohibited object reuse, intrusion detection, to improve the security of Linux system. This article provides insight to analyze a new operating system which is called Qubes. It is a secure operating system based on the development of Linux operating system. Mainly, the article researches on the security mechanism principle, the system program design and functional components of Qubes operating system. Additionally, it adds Chinese language support function to improve the Qubes operating system. The new architecture design makes a great improvement on the overall security of the Linux system.

Key words: Qubes, security mechanism, architecture