erfs is an easy-to-use, easy-to-setup, hassle-free secure file
system with the encrypted data being stored on a remote cloud
server without having to trust the server. The client is a
bash-script. The cloud server is provided by THC for free (as in
free beer!). There is no limit per user, no limit of the number of
file systems and no limit of how many locations can access the same
file system simultaneously. It supports collaboration and the same
filesystem can be accessed from different computers at the same
time. The data is securely and seamlessly synchronized. The server
has no knowledge of the content. A rogue server operator can not
access the data. All key material is created on the user's computer
and never stored or transferred to the server.
Read more https://packetstormsecurity.com/files/160144/erfs-1.4.tar.gz