I'm a researcher focussed on black-box auditing of algorithmic systems like social media platforms, usable privacy and security, and data protection.
Currently I work as a freelancer, mainly for AI Forensics and ISD. Before that, I spent time work at interface auditing auditing TikTok, doing research at Ruhr-University Bochum and at CMU working on personalized privacy assistant.
You can find a short CV and a list of my publications on Orcid and updates on publications on Google Scholar.
I am PC member of the Privacy Enhancing Technology Symposium (PETS) and Publicity Co-Chair for the Symposium on Usable Privacy and Security (SOUPS) 2022.
I spent a lot of time working on social media, but less time posting. If you are interested in staying up to date you can follow me here:
Here's what was most important to me in 2025:
Quoted: For WIRED I provided data on videos showing the Charlie Kirk shooting. AFP interviewed me and others on Holocaust AI Fakes. Our 2 year project on Auditing TikTok was profiled in DER SPIEGEL (24/2024)
AI Slop: I worked on the (missing) labeling of AI generated content on TikTok and Instagram with AI Forenics, Covered in DER SPIEGEL (39/2025)
Digital Services Act:Earlier this year I showed how the DSA-required Research API of TikTok has a lot of problems which we also reported on in techpolicy.press together with other civil society rearches. I also got interviewed for the investigations into TikTok by the Europen Comission.
Monitoring TikTok:Together with teams at AI Forensics and ISD, I monitored the Polish as well as the German elections in 2025 on TikTok and helped gather and analyse the data that showing that harrassment in comments on TikTok is genered targeting female candidates more often then male politicians. At AIF we've also monitored what's happening during the NATO Summit 2025.
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