Hey everyone, I have a massive program built using Java, And I would like to protect it in the best way that I can.

Now, This program is going through changes again and again, So I would need to recompile it every once and a while.

So basically what I am after is a program that will encode my java class files, And also for a good solution for the fact

that when someone finally gets his hands on the program, He will not be able to use it (Something like a "call home

feature".

If anyone has any good ideas for it I will be glad to hear.

Sky

Perhaps I'm way off base here, but I thought when you wrote Java code, you compiled (or at least PCoded it) while on the server - then the PCode is what's downloaded, not the source.

Other thought: is the java program all running locally on the client box ie., is it being downloaded at page call, or is this truly a standalone Java app? If it's standalone, I've purchased a few and they've all been compiled as well... so I'm a bit confused.

/p

@perks you are correct
but since the java virtual

mac

 hine is so simple, and the vm code actually does stuff like store the class names etc it can be decompiled with almost 100% accuracy.
the class names etc need to be stored so the reflection works pro

perl

 y (or what ever u call it when u query classes at runtime).

you can buy some commercial code encrytors which IMHO are a waste of $$$$.
if you are doing security with obscurity there is something seriously wrong.

Thanks nop - so you're saying that the PCode is not very close to the

mac

 hine at all... still pretty high level. Gald to know that one myself.

/p

tons of free and comercial decompiler out there just do a google
this one cool
http://www.ahpah.com/cgi-bin/suid/~pah/demo.cgi
stick in the url of the page below
http://www.dgp.toronto.edu/~mjmcguff/

learn

 /java/01-drawingLines/

the decompiler source is almost identical

Thanks, I will check these encoders, I hope they do good

I think your looking for something to obfuscate your bytecode:
http://www.google.com/search?q=java+bytecode+obfuscator
You really don't need something like this unless you are planning on selling your app.

No... These are simple things. I need something like Zend , to really encrypt the code so it cannot be decompiled.

I am looking for something that will encrypt the Class so bad, That it cannot be decompiled.

And yes, If there is a free solution, I am interested aswell