Using the user space file system to protect file

In information society, data is become one of the most important part to company or individual. At the same time, data protection has become urgent. Traditional file protection system-based on data encryption has the inherent defects. It can´t prevent man-made data destruction and falsification of data. In this paper, using user space file system and authentication server combined with encryption algorithm to solve these problems. By designing a professional user space file system and a authentication server to form a tight file protection system. The system protect file not only from file access method and authority but content resolution, and can reduce the chance of data leakage at utmost.