The main goal of this project is establishing Two Layer Encryption (TLE) and Virtual Private Database (VPD) for a invulnerable data storage system that allow multiple functions when the storage system is distributed and has no central authority and using NAC to secure end user, improve the system and protect the server and network the unauthorized person and virus and threat.-The main goal of this project is　establishing Two Layer Encryption (TLE) and Virtual Private Database (VPD) for a invulnerable data　storage　system　that allow　multiple　functions when　the　storage　system　is　distributed　and　has　no central authority and using NAC to secure end user, improve the system and protect the server and network　the unauthorized person and virus and threat.