Remote encrypted backup solutions such as Carbonite rely on proprietary software both on the client and server side.

An open modular alternative sounds appealing. Providers such has geneticmail.com offer file hosting with webdav which should be a good and open backend.



[{GraphViz title='Encrypted backup' filter='dot' imap='false'

node [shape=box];

$(nodeAttributes)
"Local Storage"--"Backup Program"
"Backup Program"--"Ecryptfs view of medium"
"Ecryptfs view of medium"--"Webdav mount"
"Webdav mount"--"Remote webdav server"
"Remote storage"--"Remote webdav server"
}]