基于Linux的加密文件系统的研究与设计

In Operate System, many methods can be taken to prevent users from accessing data in file illegally. Linux operate system contains several kinds of permissions which are used to limit the access to the file in illegal ways. These permissions, however, are too simple to avoid illegal access to the secret data adequately. In this paper, three proposals are raised to encrypt data in Linux file system. These proposals are realized respectively in different ways. After simple comparison between the three proposals, implementation process of one proposal is introduced in detail.