From the 1 of 4 linked papers with an AI index.
4 papers
Send and Pretend: Exploiting Transcript Consistency Issues in End-to-End Encrypted Group Chats
Gabriel K. Gegenhuber, Moritz Grefner, Maximilian Günther +3
The paper shows that major end-to-end encrypted messaging apps do not ensure transcript consistency in group chats, enabling a malicious participant to hide, reorder, or alter mess…
Hey there! You are using WhatsApp: Enumerating Three Billion Accounts for Security and Privacy
Gabriel K. Gegenhuber, Philipp Ã. Frenzel, Maximilian Günther +2
WhatsApp, with 3.5 billion active accounts as of early 2025, is the world's largest instant messaging platform. Given its massive user base, WhatsApp plays a critical role in globa…
Careless Whisper: Exploiting Silent Delivery Receipts to Monitor Users on Mobile Instant Messengers
Gabriel K. Gegenhuber, Maximilian Günther, Markus Maier +4
With over 3 billion users globally, mobile instant messaging apps have become indispensable for both personal and professional communication. Besides plain messaging, many services…
Prekey Pogo: Investigating Security and Privacy Issues in WhatsApp's Handshake Mechanism
Gabriel K. Gegenhuber, Philipp Ã. Frenzel, Maximilian Günther +1
WhatsApp, the world's largest messaging application, uses a version of the Signal protocol to provide end-to-end encryption (E2EE) with strong security guarantees, including Perfec…