Is there a reliable way of preventing my actionscript code (as2 or as3) from being copied (e.g. if there’s some IP in it)? I know there are tools that can decompile flash code so it’s easily reverse-engineered and I’ve also seen a few tools that claim to be able to obfuscate actionscript code in such a way that it’s not steal-able, but I wonder how reliable they are… Do you know? Thanks!
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It is by definition imposible to prevent it.
The reason is simple, the code needs to run on the client, so the client needs to be able to read it.
The best you can do is to make so hard (time demanding) to do that it’s not profitble. Flash has a built in feature to protect againt decompiling with a password. I’m not sure exactly how it works, I guess some form of encryption.
You can try and spil sensetive data up and join it at runtime, og encrypt it and get the descryption key from the server.
But in the end there’s nothing you can really do. Unless you wan’t the users to input the encryption key (password or a file). There is no build in encryption in Flash but there is a couple of free librarys like crypto lib http://code.google.com/p/as3crypto/.