how to make secure SWFs?

please tell me how to make secure SWF files, so that decompilers like sothink won't be able to decompile these swf fil开发者_高级运维es at all.

i have been assigned some research work to find out the stuff to make swf files highly secured

There really isn't any way to prevent SWF files from being decompiled. You can obfuscate the code, although that still won't prevent it from being decompiled. If you are trying to prevent piracy, the best option is to perform some piece of the logic/computation on your server and have your SWF make use of this service so that the SWF file is dependent on server-side logic that others cannot download.