I\'m trying to protect my as3 .swf flash file code from decompilation. I cannot spend $$$ on commercial compilers though. How can i encrypt my swf for free?
My brutally honest answer: don't even try. If someone has skill to make use of assets or code from your application, then they're going to have the basic knowledge needed to decompile your SWF and get what they need.
If you even want to try, then this is all I can suggest: http://www.kindisoft.com/
Hope this helps.. Or at least explains why you shouldn't spend time trying.