Telnet is a terminal emulation program, which is installed on almost every computer in the world by default. It allows people to log into other computers remotely, and to execute commands on remote machines. Most people use Telnet to read their E-mail using Pine, however there are many other uses, which we will not go into. When someone uses Telnet there is a very high security risk, since all the information including the login name and passwords are not encrypted. This means that almost anyone with a sniffer would be able to capture that information and then could use it to their own advantage. On the other hand, SSH is a Secure Shell program which is very similar to Telnet, except that it sends all the information encrypted to the remote computer. This means that information such as a login name and the password would no longer be sent as plain text. SSH provides strong authentication and secure communication over unsecure channels. It is mostly used on Unix, Linux, and other similar operating systems. TTSSH is another free SSH client program, except it runs on Windows. It is implemented as an extension DLL for Teraterm Pro. Teraterm Pro is a superb free telnet client for Windows. All three of these applications are almost identical with the exception that Telnet is not secure and could be used against the user to get into their account. Some TTSSH even have a built in remote transfer client which can be used instead of FTP (File Transfer Protocol). Thus important documents can be transferred to remote computers, because they would be undecipherable. For more information please visit the other URL's which we have provided.