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Maximilian Günther

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Jul 2026

Send and Pretend: Exploiting Transcript Consistency Issues in End-to-End Encrypted Group Chats

It is demonstrated that today's major E2EE messengers do not guarantee any form of TC for group chats, allowing a malicious group member to selectively omit, reorder, or present altered content to different recipients without triggering warnings in their user interface.

G. Gegenhuber, Moritz Grefner, Maximilian Günther et al. · 0 citations

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