While it is easy to install and run a modern PC these days, it can be hard to secure it against attacks. Some of the techniques described here are linux-specific, but most of them are a 'lifestyle of security' which is mostly platform independent.

Social engineering - “Nobody working for this bank will ever need to ask you what your PIN is. Don't tell ANYBODY your PIN, ever.” - That was the most important statement on the envelope which contained my first bank-card that was able to operate ATMs. I still go by that. Even with PCs.

Secure passwords - “O@R-V-Mmbctta!+1#” might be a secure password. It contains upper and lower case letters. It contains special characters (@!-+#). It contains a number. But how on earth shall I remember this?

GPG to Sign or Encrypt Data

Firewall

Scrubbing Harddrives - Decommissioning old PCs? What about the data on the harddrive?

Links to Other Sites on Security