4. SSHFTP (GridFTP-over-SSH)
This type of security introduces the sshftp control channel (frontend) protocol. This is a very simple means of obtaining strong security on the control channel only (the data channel is not authenticated). With this approach, you can run a GridFTP transfer anywhere that you can ssh. sshftp:// leverages the ubiquitous ssh/sshd programs to form control channel connections much in the same way that inetd forms connections.