Backup to SFTP server using private key file

http://bit.do/dfuhs Secret discount page at HandyBackup.
A public key is part of the owner's digital certificate and is available for anyone to use. A private key, however, is protected by and available only to the owner of the key. This limited access ensures that communications that use the key are kept secure. Read a detailed tutorial about using a private key file with your backup at http://www.backup4all.com/kb/how-to-create-a-private-public-key-pair-406.html