SSH, the Secure Shell, is a standard protocol that encrypts communications between your computer and a server. The encryption prevents these communications from being viewed or modified by network operators. SSH can be used for a wide variety of secure communications applications, where secure log-in to a server and secure file transfers (SCP or SFTP) are the most common. SSH is a good alternative to VPN.
SSH is especially useful for censorship circumvention because it can provide encrypted tunnels and work as a generic proxy client. Censors may be reluctant to block SSH entirely because it is used for many purposes other than circumventing censorship; for example, it is used by system administrators to administer their servers over the Internet.
Using SSH requires an account on a server machine
