When writing code for the web it is very important that you pay attention to security. Drupal provides many tools to help you out and in this presentation we'll look at what those are and how to make sure you use them properly.
Check your version
This video covers a topic in Drupal 7 which may or may not be the version you're using. We're keeping this tutorial online as a courtesy to users of Drupal 7, but we consider it archived.