SWF Defender is a software that can protect ActionScripts inside the SWF. Support Flash CS4 and ActionScript 3. Obscuring ActionScripts, Strings Encryption, Encrypted Domain Locking. SWF Defender provides you a simple custom user interface you have only some clicks to protect your SWF files. Working with SWF Defender is very simple. You have just 3 steps: Adding one or more files to your project. Setting protection options. Clicking on the Protect All button.