How can I achieve java byte code encryption (against reverse engineering)...

Question

Possible Duplicate:
How to lock compiled Java Classes to prevent decompilation

...ideally combined with licensing? Our product is ported from PHP to Java. With PHP, there was a great code encryption / license tool named IONCube Encoder. It encrypts the PHP source code an allows the execution only if a appropriate license is present.

Is there any equivalent for a Java application (that does not rely on a hardware dongle)?

Answer 1

IONCube Encoder works by obfuscating your code, not encrypting it. If you want to get the same effect, there are a number of obfuscation tools for Java, such as

• KlassMaster
• DashO

Answer 2

Take a look at JET Excelsior. That's what we've been using and it's worked pretty well for us.

Answer 3

You might also want to have a look at the proguard obfuscator