[3] Box Backup supports Linux, UNIX, Windows, and Mac OS X backup clients and servers (although Windows servers are not recommended by the authors).
[4] Box Backup is a client-server application in which a client sends data to the server for storage.
The server provides management of client via certificates, storage quotas, and data retention.
Together, a unique and robust solution is created that scales allowing clients with low-bandwidth connections to effectively perform reliable backups.
[5] Box Backup uses a modified version of the Rsync algorithm, that works with encrypted blocks.