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Linux systems use Encrypting File System (EFS) for providing confidentiality and integrity services to files stored on disk in a secure, efficient and transparent manner. Distributed encrypting file system should also provide support for secure remote access, multiuser file sharing, possible use by non-privileged users, portability, incremental backups, etc. Existing kernel-space EFS designed at file system level provides all necessary features, but they are not portable and cannot be mounted by non-privileged users. Existing user-space EFS have performance limitations and does not provide support for file sharing.
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