I just came across this excellent WordPress plugin, and thought I would share it with all of you. It’s called the Theme Authenticity Checker, or TAC for short. What this plugin does is scan for encrypted code and other suspicious looking material within a theme. If you have a theme with base64 encoding, for example, it will let you know which file in the theme contains the code. It will also list any external links within a theme and separate them by file.
Once you’ve downloaded and installed the plugin, a new page in your Design menu will appear called “TAC.” I tested this plugin on the demo server, and let me tell you – this plugin loads surprisingly fast, even with all of the themes hosted on it. In case you were wondering, all the WordPress themes here got a big green Theme Ok! message.