Phones with motion sensitivity on the level of an iPhone 4 can guess what you're typing with up to 80 percent accuracy. And this clever bit of spyware can easily Trojan horse its way onto your phone as part of an otherwise trustworthy-looking app, since it doesn't arouse your tinfoil-hat suspicions by asking for permission to use your camera or microphone. The humble tilt sensor is rarely protected against privacy intrusions, because who would ever have guessed that the little gizmo that flips your screen over when you turn your phone sideways could also be used as a goddamn drunken Facebook status update interceptor?
Of course, the algorithm for figuring out what you're typing based on tiny desk tremors is mind-bogglingly complicated, and the whole system is easily defeated by ... just not setting your phone next to your keyboard, so the chances of such an attack by your local garden-variety hacker are low. But since we already know that the government is trying to listen in on us at all times, we're typing up this article with a phone next to the keyboard just to let them know that we know.
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It's called subtlety, guys.