I Know Which Device You Used Last Summer: Fingerprinting WhatsApp Users’ Devices
ID: 35352060-155a-500c-9d08-083604d28b83
STIX ID: report--35352060-155a-500c-9d08-083604d28b83
Feed Name: Tal Be'ery
Threat Score
*Researchers demonstrate that WhatsApp's Multi Device protocol and platform-specific Message ID generation leak device counts, persistent device identifiers, and operating system information (Android, iOS, Windows, macOS), enabling OS fingerprinting and targeted reconnaissance; they document empirical Message ID patterns, a Chrome-extension proof-of-concept, and recommend unifying Message ID logic to mitigate the privacy leak.*
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