"Precisely," Miller said. "The source code is gone, but the behavior is immortalized in the bytecode. The decompiler just translated the machine's movements back into human language. We can see that if the input matches that hardcoded string, it bypasses the security check entirely."
"So we're stuck?" Jenks asked.
Miller shook his head. "Not always. Decompilation is messy. Sometimes the decompiler gets confused by loops or try-catch blocks, spitting out 'goto' statements that don't look like natural code. It’s like trying to turn a baked cake back into flour and eggs; you can grind it down, but you'll never get the eggs back in the shell. You get the ingredients list, and that's usually enough." decompile class file