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WhatsApp Has a Years-Old Security Problem. Here's How to Solve It.

Phone numbers are a finite resource. So when one goes out of a service, there’s a good chance telecom companies will reuse it for a new phone plan. That can be a big problem on WhatsApp. In some cases, if you get your hands on a phone number that was tied to an existing WhatsApp account, you can hijack it and assume… Read more…