Hi Meta, WhatsApp with privacy?
TL;DR: Meta’s WhatsApp suffers from a privacy issue that leaks victim devices’ setup information (mobile device + up to 4 linked devices) to any user, even if blocked and not in contacts. Monitoring this information over time allows potential attackers to gather actionable intelligence about their victim’s devices setup and changes to it (device replaced/ added / removed).
The Easiest Way to Verify WhatsApp Phone Number
Meta’s WhatsApp is the most popular messaging app in the world, with over five billion downloads and 2.4 billion active users. WhatsApp’s End-to-End Encryption (E2EE) protocol is the cornerstone of protecting its users’ messages’ confidentiality. However, WhatsApp E2EE protocol design suffers from some privacy issues.
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