FSFS is a secure distributed file system in user space built over FUSE and OpenSSL. It stores AND transfers data between clients and server in secure form, leaving most of the cryptography to the clients, thus relieving the server of the additional work.
This software is a distributed replicated blob server (inspired by the google file system paper http://www.cs.rochester.edu/sosp2003/papers/p125-ghemawat.pdf ). It stores your blobs ( <=> files) on a given number of your servers.