Edgar Weippl
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weippl.bsky.social
Edgar Weippl
@weippl.bsky.social
63 followers 49 following 35 posts
Professor for Security and Privacy, University of Vienna
Posts Replies Media Videos
weippl.bsky.social
Obfuscation detection using matrix complexity features of binary grayscale images

Sebastian Raubitzek, Sebastian Schrittwieser, Caroline König, Patrick Felbauer, Kevin Mallinger, Andreas Ekelhart, Edgar Weippl, Computers & Security, lnkd.in/gaYgBDWW.
Download at lnkd.in/dcfxBSa8
November 29, 2025 at 2:38 PM
weippl.bsky.social
Nice interview with Aljosha on our current WhatsApp paper (University of Vienna and SBA Research): netzpolitik.org/2025/intervi...

The full paper as preprint: arxiv.org/abs/2511.20252

Hey there! You are using WhatsApp: Enumerating Three Billion Accounts for Security and Privacy. NDSS, 2026.
November 28, 2025 at 9:42 AM
weippl.bsky.social
Lots of additional news outlets picked up our media release about the Whatsapp paper a few days later:
- www.pressreader.com/austria/kuri...
- www.t-online.de/digital/aktu...
- www.ad-hoc-news.de/boerse/news/...
- www.ad-hoc-news.de/boerse/news/...
- www.ad-hoc-news.de/boerse/news/...
...
War­nung vor „Psy­cho-Trick­ki­ste“der Händ­ler im Inter­net | Kurier
Als ob die Vor­weih­nachts­zeit nicht schon genug Stress bescherte, pras­seln auf die Men­schen im Inter­net noch mas­sen­haft mani­pu­la­tive Tricks ein, die schnel­les beden­ken­lo­ses...
www.pressreader.com
November 22, 2025 at 9:42 AM
weippl.bsky.social
Cispa European Cybersecurity & AI Hackathon Championship an der Universität Wien
cispa.de/en/cispa-hac...
November 20, 2025 at 9:42 AM
weippl.bsky.social
"Informatiker*innen der Universität Wien und von SBA Research haben eine große Datenschutzlücke im Contact Discovery Mechanismus von WhatsApp aufgedeckt." www.univie.ac.at/aktuelles/de...
November 19, 2025 at 7:01 AM
weippl.bsky.social
"“Well, scientists now know a lot of phone numbers,” ... “So what?” Repeated warnings ... filed away. Only when the researchers submitted a draft of their paper twice did Meta wake up: a surprising amount can be read from the data, ..."

Heise: buff.ly/HCWaEWh
FutureZone: buff.ly/IIjmR7G
November 19, 2025 at 6:59 AM
weippl.bsky.social
"Malware that conceals its behaviour through code obfuscation remains a central challenge for automated detection. ... We transform binary code into grayscale images " (buff.ly/umNhO4T)
November 13, 2025 at 2:38 PM
weippl.bsky.social
CISPA European AI and Cybersecurity Hackathon Championship. Dec 13+14 @Univie
November 5, 2025 at 11:22 AM
weippl.bsky.social
Critical XSS vuln (CVE-2025-39663, CVSS 9.1) in Checkmk fixed.
Discovered by SBA Research — allowed JS injection & potential RCE in distributed setups.
Admins: update to 2.4.0p14 / 2.3.0p39, disable “Trust this site completely”.
🔗 heise.de/-10964747
October 31, 2025 at 9:42 AM
weippl.bsky.social
David Schmidt, Sebastian Schrittwieser, and Edgar Weippl received the Distinguished Paper Award at ACM CCS 2025 (A*-rated) for their work “Leaky Apps: Large-scale Analysis of Secrets Distributed in Android and iOS Apps.” (cdl-astra.at/2025_09_ccs_...)
October 16, 2025 at 8:42 AM
weippl.bsky.social
"For the first time, the University of Vienna places among the top 100 – ranked in 95th position, the University of Vienna is the first Austrian university to make it into the top 100..." (www.univie.ac.at/en/about-us/...)
October 9, 2025 at 8:42 AM
weippl.bsky.social
68th Vienna Deep Learning Meetup: CommentSense hosted at SBA Research, in cooperation with the SEC group of the University of Vienna. www.meetup.com/vienna-deep-...
September 8, 2025 at 8:42 AM
weippl.bsky.social
At Defcon 33 Gabriel Gegenhuber and Maximilian Günther (University of Vienna and SBA Research) presented a series of new attacks against the two messaging services.

Defcon : buff.ly/f7izsXH
News: buff.ly/CK0jVOB buff.ly/onMSSoy
August 17, 2025 at 8:42 AM
Reposted by Edgar Weippl
hofhackerei.at
We got 9th place at @defcon.bsky.social #CTF! Props to all finalists for an intense fight over the past three days and congrats to MMM for taking the win.

Thanks to Nautilus Institute for the neat setup this year, we had a blast.

Until next time, Vegas!

#DEFCON #DEFCON33
Team picture Final scoreboard Team dashboard
August 12, 2025 at 2:04 AM
weippl.bsky.social
... „Dark Patterns nutzen einfach unsere psychologische Schwächen aus. Wenn ich vorab darüber informiert bin, weiß ich zumindest, worauf ich mich da einlasse“, so Informatiker Schrittwieser von der Universität Wien... (help.orf.at/stories/3231...)
August 3, 2025 at 8:42 AM
weippl.bsky.social
Enjoying my research stay at NII Tokyo as visiting professor, working with Prof. Isao Echizen’s group on multimedia security, privacy, and synthetic media detection. Exciting work on deepfake detection & PrivacyVisor. Looking forward to returning in 2026. buff.ly/KC7xkV5
July 29, 2025 at 8:06 AM
weippl.bsky.social
Not the typical security venue/journal: Computers and Electronics in Agriculture.

We propose explainable tabular RL for crop rotation planning; compared to deep Q-learning, our method yields similar/better outcomes; is resilient to external perturbations. buff.ly/HoYTd5H
July 20, 2025 at 1:38 PM
weippl.bsky.social
COSE's impact factor increased from 4.8 in 2024 to 5.4 in 2024; After 15 years on the editorial board of COSE, I step down. I’ll continue to support the journal as liaison to IFIP TC 11, where I now also serve as secretary. I continue with ACM TOPS and IEEE TIFS.
July 20, 2025 at 8:42 AM
weippl.bsky.social
We’re hiring: Tenure-Track Professorship in Human-Computer Interaction at @univie
Join a strong CS faculty & the renowned University of Vienna in the heart of Europe.
Deadline: 17 Sep 2025
jobs.univie.ac.at/job/Tenure-T...
July 18, 2025 at 8:42 AM
weippl.bsky.social
This spring Peter Kieseberg finally defended his PhD thesis on Data Leak Detection. It included some really established (nice word for old ;-) ) papers and recent work of his Josef-Ressel Center on Blockchain technologies and security management (buff.ly/zKwsCWn).
July 9, 2025 at 7:21 AM
weippl.bsky.social
Gutes Interview mit René Mayerhofer zum Thema Staatstrojaner (www.falter.at/zeitung/2025...)
July 7, 2025 at 8:42 AM
weippl.bsky.social
On Ascension Day, representatives of the University of Vienna take part in the procession from St. Stephen's Cathedral due to a relationship between the institutions, dating back centuries. Photos(c)Erzdiöz.Wien/Schönlaub, Univ.Wien Zell; buff.ly/Crafw8V
June 29, 2025 at 1:38 PM
weippl.bsky.social
Jennifer Sturlese (FH Wiener Neustadt www.fhwn.ac.at/en/employee/...) recently started her PhD studies at the SEC group (@univie sec.cs.univie.ac.at) and works on serious games for red/blue teaming (and other colors)
June 29, 2025 at 8:42 AM
weippl.bsky.social
Tabular reinforcement learning for reward robust, explainable crop rotation policies matching deep reinforcement learning performance, Computers and Electronics in Agriculture, 237 (B): 2025, 110571, ISSN 0168-1699,
doi.org/10.1016/j.co... (Open Access)
June 20, 2025 at 8:42 AM
weippl.bsky.social
Cybercrime und Online-Betrug: Vortrag in Retz

Am Dienstag, 24. Juni 2025 beleuchten wir in einem öffentlichen Vortrag in Retz typische Formen von Online-Betrug – mit echten Beispielen, klaren Erklärungen und konkreten Tipps für den Alltag.

buff.ly/QeLyrKO
June 15, 2025 at 8:42 AM