Here's my 411 on YJ security from wheel locks to hood locks to door hinge security to console security to car alarm system...
Wheel Locks: McGard (
www.mcgard.com). These are keyed lug nuts (replacing 1 of the 5 on ea. wheel) that can only be removed with a "key" that affixes to a ratchet set. You can buy just a single for the spare or a set of 5 so that all of your wheels are protected. There are varying sized lug nut threads, so you'll want to check the website and order the correct ones for your specific rims. Total cost for a set of 5 is about $40. You can also order a small nylon zipper pouch to safe-keep the key. The pouch is awesome as it has an elastic loop on the back which allows you to snuggly store it on the tire iron/jack stored under your locked hood.
Door Hinge Locks: Being able to remove a Jeep's doors is a real treat for Jeepers. Have you ever considered how easy they can be removed and/or stolen?. A simple crescent wrench will release the hinge pin. To secure your doors, check out the McGard (part #76057) door hinge locks. Set of two is about $35.00.
Hood Lock: I recommend the Tuffy (tuffyproducts.com) YJ hood lock #295. (I couldn't find the invoice, so I don't remember what I paid for it.)_. Also for an extra $10. get the accompanying dust cover (part #091). If you look at the photo of my post re: naming my rig Square Lights, you'll see it mounted in the upper left corner behind the grill. I installed it myself and would consider it a medium to difficult install. I remember tuning in a SF 49er football game when I/it started & the game was just ending when I finished. Unlike the Rugged Ridge YJ Wrangler Hood Lock which I was able to easily jimmy open, this Tuffy product is solid and one would have to do major damage to the hood to bypass it.
Security Console: Another recommended investment IMHO, is replacing the stock center console with a Tuffy locking one. Check out the website for various models/colors. One of the advantages w/ Tuffy products is you can key them all the same. Thus my hood lock and center console both lock with the same key.
Car Alarm System: 6 1/2 years ago, my rig was stolen right out from an underground apartment garage. It went missing for 3 weeks but was eventually recovered.. Other than the stereo gear all being stolen, the lock on my Tuffy console being drilled out, and the lock on the ignition stripped, the vehicle was not otherwise damaged. My first investment (after replacing the ignition switch) was to invest in an alarm system. My choice was the Viper Smart Start. (viper.com/smartstart) Don't remember the cost, but approx. $300-400 including installation. This alarm system has the capability to remote-start your vehicle, although I didn't purchase that option. The features I use include: obviously a sound=alarm, the ability to use a key fob or a smart phone to turn the system on/off, an ongoing meter of your battery's charge, and GPS. In addition to the initial cost, there is a 3-yr. monitoring fee of $300 (100 per year) for the GPS. I find this an invaluable feeling of security. Even if your rig is stolen, your GPS will tell you where it is. Another cool feature (which I don't use b/c nobody but me drives my rig) is called fencing. With the GPS you can set either an interior or exterior "fence" limiting where your rig can travel. Say, for example, you have a teenager who you don't want driving a long way from home. You can set a parameter limiting where the Jeep can be driven without sending an alarm. Or maybe you don't want your teenager to be in/at a specific place. You can set a parameter around that space preventing the Jeep from going into it without setting off the GPS alarm. Also FWIW, I went online and found stickers to put on my windows alerting would-be thieves that my rig is protected with a GPS. As mentioned, I've had this system for over 6 years and it has performed flawlessly.
Hope you find all this "security stuff" helpful.