加密文件系统和可信恢复是保障计算机安全，增强操作系统安全性的两项关键性技术，本文集中对这两项技术做了较为深入的研究。
Encrypted file system and trusted recovery are two important technologies for improving the security of OS, and this paper makes a deep research on them.
因此，系统安全性还存在问题，我们需要进一步改进、完善这个文件系统。
Therefore, the security of the system sill there are problems exist, we need to further improve and perfect the system of this document.
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