gommzystudio/device-activity-tracker
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A phone number can reveal whether a device is active, in standby or offline (and more). This PoC demonstrates how delivery receipts + RTT timing leak sensitive device-activity patterns. (WhatsApp / Signal)
4 mentions on Hacker News by 4 people: 3 stories, 1 comment · first 2025-12-10 · latest 2025-12-31
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Exploiting Silent Delivery Receipts to Monitor Users on Instant Messengersstory by tcsenpai · 2025-12-31 · 0 comments
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Paper: https://arxiv.org/pdf/2411.11194 GitHub repo: https://github.com/gommzystudio/device-activity-tracker
comment by pil0u · 2025-12-30 -
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Exploiting Silent Delivery Receipts to Monitor Users on WhatsApp/Signalstory by krick · 2025-12-29 · 0 comments
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Device Activity Tracker: WhatsApp Activity Tracker via RTT Analysisstory by thunderbong · 2025-12-10 · 0 comments