Research and Application of Transparent Encrypting File System Based on Windows Kernel

By analyzing the basic principles of file encrypting system, the essay mainly research and implement the transparent encrypting file system which is based on the filter driver in the kernel driver layer. With the help of this system, not only a certain type of file can be encrypted, but the specified file or folder can also be encrypted easily and efficiently. The system applies shared memory, windows massage mechanism, I/O driver technology and the other technology to implement information synchronization and data communication between the user model and kernel made. Compared with other encrypting technologies, the file system filter driver which is based on the transparent file encrypting technology has overcome the shortcomings of several other technologies. Because it is much more closer to the kernel, it can effectively intercept any file operation. The experiment results show that the interception efficiency is higher than other file encrypting system. Besides , the system's performance is much more security and reliable.