Backup4all supports backing up to a remote computer or device using SFTP (SSH File Transfer Protocol) connection. This is also practical backup destination because the backed up data can be easily accessed from any other computer with an Internet connection.
This article explains how to generate a self signed certificate. A self-signed certificate is an identity certificate signed by its own creator. That is, the person that created the certificate also signed off on its legitimacy.
SFTP, also known as SSH File Transfer Protocol (and sometimes called Secure File Transfer Protocol or SFTP) is a network protocol that provides file transfer and manipulation functionality over any reliable data stream. It is typically used with version two of the SSH protocol (TCP port 22) to provide secure file transfer but is intended to be usable with other protocols as well. The SFTP protocol is much secure than the FTP protocol.
This article explains how to create a private-public key pair. Private-public key cryptography is a relatively new cryptographic approach whose distinguishing characteristic is the use of asymmetric key algorithms instead of symmetric key algorithms.