The 392 isn't any easier to steal, it's just more desirable. I've thought about building a shield over the star connector but haven't yet. On the thefts I've read about, they break a rear window to enter the Jeep. Once inside, they connect a computer to the star connector, delete all the original keys and program a new key that they have. At that point they just start the jeep and drive off. They also disable the Uconnect so that you can't track the Jeep. IGLA and Tazer can both require a PIN to be entered before starting the Jeep with a key, but there's downsides to both. I Installed a Compustar alarm with a glass breakage sensor on mine so that if someone breaks in, the alarm will sound and hopefully scare them away. The alarm also notifies my phone and has its own GPS locator with a battery backup.
As Winston mentioned, a faraday pouch will protect you if they attempt a relay attack.
In this blog, we will explain why Compustar is the best security solution to protect against key hack attacks.
www.compustar.com