Yes, the hackers use openEncryptedFile function
and after a few days all your work go for nothing.

How you fight with piracy?
Please suggest me another file encryption protection.

Thanks in advance for all your help!

Anubis

Max 9 through 2009, XP-Pro x64 SP2
ASUS EAH3450 Series (Driver 8.470).
Core 2 Duo E8400 3GHz, 4Gb Ram, DX9.0c.

Version 1 algorithm is also unsafe technically and proved.Once I have explained the scheme in Autodesk AREA long time ago with warning and other authorizing solution suggestted.But since it’s very sensitive to Autodesk.The post was deleted 15 minutes after I post it.So I will only give out suggestion here this time.No more decryption detail.

1.If you wanna protect your source code.Try bundle it with C++ plugin written with MaxSDK.Execute your maxscript code on the fly.And don’t forget to pack your plugin dll with a stronger packer program.

2.If you wanna protect your data.Then don’t encrypt it via encryptFile because that cause you exposed the key when you decrypting it.(Think if your source code is decrypted,your key passed as parameter in decryptFile function is also exposed.)So try implement the file streaming in C++ plugin,too.

I know it’s hard for artists who hardly learnd maxscript programming to move deeper for developping complicate plugins in C++.But that makes your code really harder to analyze and reverse engineering.

And there is another idea about protect your code.That’s the socalled obfuscating.And it’s useful to your C# code,too.Because .Net code is also reversable.

The idea is simple.That after you finished your job.replace the variable,function name blah blah.. to meaningless word like aa,abc,a1,a2…
There are lots of .Net obfuscator on internet.But since there is no one for maxscript.You can implement this idea by simply replace variable,function name by your hand in the whole source.
It’s a bit tired to do this.And it makes the logic analyzing a lot more hard for code stealer.