TEFS is a transparent encrypt software,working in the Kernel of Windows,supporting dynamical(real-time) decryption.With it,we can edit the encrypted files directly without decrypting. Data is decrypted only when in memory, and never on the disk. The process is seamless to both users and applications. It support all storage media:Disk,CD,etc.,and all FileSystem: FAT,NTFS,etc.TEFS can expand encrypt strategy list by integrating.The TEFS kernel can be switched.TEFS use File Itself Based technology. TEFS:Unify security with convenience perfectly.