How to protect yourself from people downloading / stealing flash games from your websites

Question

i am developing games in flash as5. Just started 1 month ago.

I knew years back when it was possible to just go to a website and then click on menu extras ->site information->media files and than download the game to play offline or even decompile.

nowadays i see this is not anymore possible, for example:

http://www.miniclip.com/games/robo-rampage/en/

http://www.casinoeuro.com/en/casino-games/table-games/txs-holdem-poker/0,1-5

how do they prevent this? i am coming from php and i know in this scripting language you can't hide the source. how is that in flash?

the only thing i can download here are: loaders.swf or gameloader.swf.

Would it be possible for someone to completely recreate these games?

if you don't have a decompiler, here is what is inside such a loaders.swf/gameloader.swf, click on Actionscript: http://software.pedrofaustino.com/swfinfo/sidebar/index.html?file=loader.swf

Answer 1

The method that I use, is upon start up check loaderInfo.url (in as3) and make sure it matches the url of your website (or substring look for the domain) and if it's not there, then someone put it on another web site (stole it) or is trying to run it locally (which url will say localhost). This however does not prevent any decompilers to run, but there are obfuscators for that such as swfencrypt