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Efosa Udinmwen

WhatsApp security flaw lets experts scrape 3.5 billion user numbers - here's what we know, and how to stay safe

WhatsApp.
  • WhatsApp has 3.5 billion active accounts exposed to metadata scraping risks globally
  • Contact-discovery flaw allowed enumeration of phone numbers at a massive global scale
  • Millions of encryption keys were reused across accounts, undermining security assumptions

WhatsApp users may need to take extra steps to protect their account information following a potentially concerning discovery.

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