From the 1 of 11 linked papers with an AI index.
11 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…
Context Matters: Repository-Aware Security Analysis of the Agent Skill Ecosystem
Florian Holzbauer, David Schmidt, Gabriel Gegenhuber +2
Agent skills extend local AI agents, such as Claude Code and OpenClaw, with additional functionality. Their growing popularity has led to dedicated marketplaces resembling mobile a…
Democratizing Measurement of Critical Mobile Infrastructure: Security and Privacy in an Increasingly Centralized Communication Ecosystem
Gabriel K. Gegenhuber
Cellular networks serve as the backbone of global communication, providing critical access to telephony and the Internet, often in regions lacking alternatives. However, the growin…
A Relay a Day Keeps the AirTag Away: Practical Relay Attacks on Apple's AirTags
Gabriel K. Gegenhuber, Leonid Liadveikin, Florian Holzbauer +1
Apple AirTags use Apple's Find My network: when nearby iDevices detect a lost tag, they anonymously forward an encrypted location report to Apple, which the tag's owner can then fe…
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…