🥶 Pass me a cold one: Relay hacks and keyless jamming are ways someone can take over your car’s key fob. Paid solution: Buy a signal-blocking case, like this shielded RFID-blocking pouch. Free solution: Put your key fob in the refrigerator or freezer; the multiple layers of metal block the signal.

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I had a joke, but someone stole it: I thought this was interesting. Radio-emitting threads could replace metal tags to stop shoplifters. A company called Myruns is behind the tech. The threads are five times thinner than a single human hair. Special ink inside the threads would transmit signals to set off alarms.