| Computer Incident Advisory Capability - The Department of Energy runs a great site with lots of good Bulletins relating to security holes in all major operating systems and software packages. Lots of good information can be found here. | Computer Security Resource Clearinghouse Run by the National Institute of Standards and Technology. A good place to look for computer security information. | |
| SSH Secure Shell - Secure Shell, or SSH is basically a replacement for telnet and remote shell programs on Unix. It encrypts passwords and data between client and server. |