A recent YouTube video purports to show how hackers can take control of a Whatsapp account in order to read the victim’s messages and assume their identity. Although Whatsapp benefits from relatively secure end-to-end encryption, the problem of breaking that encryption is avoided by using SS7 messages to facilitate the creation of a bogus duplicate Whatsapp account, which then takes the place of the original. The video was made by Russian security firm Positive Technologies, who have also posted a blog explaining the techniques they use to take over Whatsapp and Telegram accounts. Watch below as they walk step-by-step through the hijacking of a Whatsapp account.
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