encfs

EncFS provides an encrypted file system, layered on top of a normal
directory tree and encrypts individual files which are stored in the
hosting directory tree.
This has several advantages over the loopback encryption which
provided by the Linux kernel:

No space is and has to be reserved, encrypted files only
take the space that they really occupy
Backups: encrypted files can be individually backed-up on the host
filesystem
Layering: Since it's hosted on a normal filesystem, encfs can be
used on filesystems which normally have no support encryption,
like NFS or other userspace filesystems.

EncFS is implemented as a userspace filesystem in an unprivileged
application using fuse (FUSE (Filesystem in USErspace)).

          

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License: GPL-2.0-or-later AND GPL-3.0-or-later
URL: https://vgough.github.io/encfs/