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Facebook 0 Twitter 0 livefyre Email Print Photo illustration. Not for your voice, like the Amazon Echo or Siri , but for an electronic signal, such as the coded "unlock" signal from your electronic key fob. In some cars, the engine will even turn on. Wirelessly unlocking your car is convenient, but it comes at a price. Let's look at how criminals pull this off and what you can do to keep your car safe. How your car's security system works As you've probably noticed, you can't just open your car with any old radio signal. You need your specific key fob to do the job, and there's a reason. A key fob uses a computer chip to create a unique code that it sends to your car's security system. The car also has a chip that uses the same algorithm to generate codes. If the codes match up, the car opens. There's a bit more to it, but those are the basics. But it turns out that a popular system from Megamos Crypto isn't as secure everyone thought. After that, a computer can figure out the code in just half an hour and unlock the car. In a real-world application, a thief could sit on a street and gather wireless signals as car owners enter and exit their vehicles. Then overnight they could steal a number of cars. Click here to find out if your car is at risk from this kind of attack. Still, it takes a skilled car thief or hacker to carry out this kind of attack, so the odds of it happening to you are slim. But thanks to always-on key fobs, there's another risk that's much more likely to happen. As long as your keys are in range, anyone can open the car and the system will think it's you. That's why newer car models won't unlock until the key fob is within a foot of them. In other words, your keys could be in your house, and criminals could walk up to your car and open it. This isn't just a theory; it's actually happening. Steps to stop car thieves Fortunately, there are some simple steps you can take to keep hackers from stealing your signal. The multiple layers of metal will block your key fob's signal. Just check with the fob's manufacturer to make sure that freezing your key fob won't damage it. If you're not hot on freezing your key fob, you can do the same thing with your microwave oven. Don't turn it on. Stick your key fob in there, and criminals won't be able to pick up its signal. Like any seasoned criminal, they'll just move onto an easier target. Since your key fob's signal is blocked by metal, you can also wrap it up in aluminum foil. While that's the easiest solution, it can also leak the signal if you don't do it right. Plus, you might need to stock up on foil. You can also make a foil-lined box to put your keys in, if you're in a crafting mood. You should also be aware that this kind of signal stealing isn't a problem just for car key fobs. Newer passports and other I. You don't need aluminum foil, however. Key fob hacking isn't the only danger to modern cars. Learn how hackers can take control of cars through their entertainment systems and other avenues of attack. On the Kim Komando Show , the nation's largest weekend radio talk show, Kim takes calls and dispenses advice on today's digital lifestyle, from smartphones and tablets to online privacy and data hacks. For her daily tips, free newsletters and more, visit her website at Komando.
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