An Obfuscation Technique for Java Bytecode Based on Code Scrambling

In general, Java bytecode programs can be decompiled into source code. From the standpoint of protecting intellectual properties, bytecode should not be cracked by third person. We propose a technique including several methods to obfuscate bytecode by code-scrambling. Our technique makes bytecode illegible for man and resilient to many existing decompilers. We have also implemented a simple obfuscator and measured execution overheads of our obfuscated programs.