It's that time of year again: The wonderful, terrifying week when hackers and security gurus descend upon Las Vegas to show off their skills and unleash presentation after presentation full of scary-sounding exploits. This year is no different. Over the previous week, we've heard tales of planes brought down by rogue code, snoops spying on your security cameras, and secretive, undetectable code that can turn any USB drive into an unstoppable malware vessel.
If the past is any indication, most of these exploits are scarier in theory than in fact

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