Users of telnet, rlogin, and ftp may not realize that their password is transmitted across the Internet unencrypted, but it is. OpenSSH encrypts all traffic (including passwords) to effectively eliminate eavesdropping, connection hijacking, and other attacks. The encryption that OpenSSH provides has been strong enough to earn the trust of Trend Micro and other providers of cloud computing.Additionally, OpenSSH provides secure tunneling capabilities and several authentication methods, and supports all SSH protocol versions.
SCRIPT COMPARE. A side-by-side reference sheet sheet one: version | grammar and execution | variables and expressions | arithmetic and logic | strings | regexes | dates and time | resizable arrays | dictionaries | functions | execution control | exceptions | concurrency sheet two: streams | files | file formats | directories | processes and environment | option parsing | libraries and namespaces | objects | inheritance and polymorphism | reflection | net and web | gui | unit tests | debugging and profiling | java interop.