Dipl.-Ing. Philipp Frenzel, BSc

Research Group Security and Privacy

Kolingasse 14-16
1090 Wien

philipp.frenzel(at)univie.ac.at

Publications

Hey there! You are using WhatsApp: Enumerating Three Billion Accounts for Security and Privacy. / Gegenhuber, Gabriel Karl ; Frenzel, Philipp É.; Günther, Maximilian et al.
NDSS 2026. 2025.

Publications: Contribution to book › Contribution to proceedings › Peer Reviewed

doi.org/10.14722/ndss.2026.230805

Careless Whisper: Exploiting Silent Delivery Receipts to Monitor Users on Mobile Instant Messengers. / Gegenhuber, Gabriel Karl; Günther, Maximilian; Maier, Markus et al.
28th International Symposium on Research in Attacks, Intrusions and Defenses (RAID 2025). 2025.

Publications: Contribution to book › Contribution to proceedings › Peer Reviewed

doi.org/10.48550/arXiv.2411.11194

Prekey Pogo: Investigating Security and Privacy Issues in WhatsApp’s Handshake Mechanism. / Gegenhuber, Gabriel Karl ; Frenzel, Philipp É.; Günther, Maximilian et al.
19th USENIX WOOT Conference on Offensive Technologies (WOOT '25). 2025.

Publications: Contribution to book › Contribution to proceedings › Peer Reviewed

doi.org/10.48550/arXiv.2504.07323

Poster: SIMulator: SIM Tracing on a (Pico-)Budget. / Gegenhuber, Gabriel K.; Frenzel, Philipp É.; Dabrowski, Adrian.
WiSec 2025 - Proceedings of the 18th ACM Conference on Security and Privacy in Wireless and Mobile Networks: 18th ACM Conference on Security and Privacy in Wireless and Mobile Networks. New York: Association for Computing Machinery, Inc, 2025. p. 288–289 (WISEC Conference Proceedings).

Publications: Contribution to book › Contribution to proceedings › Peer Reviewed

doi.org/10.1145/3734477.3736151

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