Experts have long known the risks associated with charging a smartphone using a USB cord that can also transfer data, but new research shows that even without data wires, hackers using a "side channel" can quickly find out what websites a user has visited while charging a device. In a recent paper published in IEEE Transactions on Information Forensics and Security, researchers warn that "a malicious charging station" can use seemingly unrelated data—in this case, a device's power consumption—to extract sensitive information.
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