How Device Verification protects your WhatsApp account
Apr 13, 2023Attaullah Baig, Archis Apte
Summary
Introduced Device Verification, a new security feature for WhatsApp that prevents account takeover (ATO) attacks by detecting and blocking unauthorized connections. This is achieved by leveraging a security-token, nonce, and authentication-challenge mechanism to validate client connections to WhatsApp servers, ensuring that only legitimate devices can re-establish trusted connections and retrieve messages. The feature aims to protect users from malware that steals authentication keys from unofficial WhatsApp clients.
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