The idea of that talk is to go through the classes of vulnerabilities or security problems that you usually need to take care of yourself and look at the Zend Framework to check what internal protection ZF offers and how they are used and what problems you still need to solve on your own.

http://techportal.ibuildings.com/2009/10/13/secure-programming-with-the-...

In this article I'll show you a simple approach to enable your Zend Framework application saving lots of precious bandwidth, and thus, making it more end-users friendly, and save on bandwidth costs.

This technique involves HTTP conditional GET. This is basically a feature of the HTTP protocol. By sending correct HTTP headers with your application, you enable browsers of your end users to cache pages of your site.

Are you worried about users having old versions of page in cache? Then don't! This technique allows to get all the benefits of client side caching without affecting anything but 5 minutes of your time to integrate it.