Filesystem Passwords Monitor Logs Physical Security User Management 13. It provides strong authentication and secure communications over insecure channels. For your most secure systems, you can run Ssh instead of telnet and ftp.
All communications are automatically and transparently encrypted.
Encryption is also used to protect against spoofed packets and hijacked connections. X11 connection forwarding provides secure X11 sessions. An authentication agent, running in the user's local workstation or laptop, can be used to hold the user's RSA authentication keys. Multiple convenience features fix annoying problems with rlogin and rsh. Secure Shell is widely used and very stable - we highly recommend it.