B4J Question Any methods for protecting my code against decompilation?

[MegatenFreak]

Hello.
I'm in a situation where it's critical that I protect my app from being hacked or cracked.
For more sensitive parts of the code algorithm, I've tried making it less understandable (after decompilation) by spreading passwords strings as characters across different modules.
I was wondering if there is a library or a method to increase a B4J app's (in other words, JAVA app) security against hackers.
Thanks in advance.
(p.s. I do use 'obfuscated release' mode, of course!)

 

[Erel]

Obfuscation, including string obfuscation, will help.

Code Obfuscation

This tutorial is relevant for B4A and B4J. During compilation B4A generates Java code which is then compiled with the Java compiler and converted to Dalvik (Android byte code format). There are tools that allow decompilation of Dalvik byte code into Java code. The purpose of obfuscation is to...

www.b4x.com

 

[MegatenFreak]

Obfuscation, including string obfuscation, will help.

Code Obfuscation

This tutorial is relevant for B4A and B4J. During compilation B4A generates Java code which is then compiled with the Java compiler and converted to Dalvik (Android byte code format). There are tools that allow decompilation of Dalvik byte code into Java code. The purpose of obfuscation is to...

www.b4x.com

Thank Erel. I had forgotten that obfuscation works on variable names as well. I just need to make sure not to include an underscore.
Just to make sure: local variables (like ones declares inside subs) don't need obfuscation, right? because a lot of my local variables include underscores.

 

[Erel]

Just to make sure: local variables (like ones declares inside subs) don't need obfuscation, right?

True.

You can use one of the many Java decompilers to see the result.