Ask about SWF Decompiler

hi all, i’m new here…

i want to ask question about swf protector against swf decompiler.
i saw so many protector using obfuscator,encryption like that…
i want to use FMS (flash media server) that will invoke callback function…
i’m afraid using encryption,will not detect the name of the function
my question is :
is there any other solution except using obfuscator to handle decompiler?
thanks before…