SIM-swapping has plagued cryptocurrency holders for close to a year, and now Google’s head of account security has had enough. He wants to put a stop to it with a clever gadget the size of a flash drive. This new form of identity fraud hinges on tricking telecom staff into rerouting a victim’s telephone number to a SIM card housed in a device under the control of an attacker. Its effect was demonstrated recently when a victim filed a $224 million lawsuit against his cell phone provider, AT&T, alleging gross negligence that led to $24 million worth of cryptocurrency being taken from his…

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