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SAIID EL HAJJ CHEHADE
PhD Candidate · EPFL SPRING Lab · Web Privacy & Security
I am a PhD candidate at SPRING Lab in EPFL, Switzerland 🇨🇭. I focus on web privacy and security research. I am interested in finding more robust tools to study the opaque web ecosystem! Can we automate security and privacy analysis further?
Clean code proponent and full-stack development enthusiast. Artistically inspired across mediums.
Contact
BC 266, EPFL CH-1014 Lausanne, Switzerland
+41 21 693 99 77
GET /news
I was invited to present our recent work on 'Fingerprintability of Customized Ad Blockers' at the Ad Filtering Dev Summit (AFDS) 2025 in Limassol, Cyprus. You can find my talk here. Many thanks to the organizers for the opportunity!
I spent the summer in London collaborating with the amazing team at Brave, where I worked on optimizing web presentation for automated agents to enrich privacy web measurement and crawling. Thankful to Prof. Hamed Haddadi for the opportunity!
We developed an ethical server-side scanning tool, VSF🔁, that made it to IEEE S&P 2025🎉. Go give it a read!
Our exciting work on fingerprinting ad-blocker filter-lists 👀 got accepted at USENIX 2025.
I spent the summer at CISPA to work with Dr. Ben Stock on authorization issues and server-side scanning. Check my interview with CISPA about my experience there.
Our work (My first paper 🎉) on Saliency-informed breakage detection got accepted at IEEE S&P 2024.
GET /research
The modern web is a complex ecosystem where browsers, servers, and extensions interact in ways that create unexpected privacy and security risks. My research systematically investigates each of these layers, building automated tools that can study the opaque web ecosystem at scale.
/research/advisor
Working under the supervision of Prof. Carmela Troncoso
/research/interests
I am mainly interested in investigating the realm of web privacy and security, focusing on browsersserver-sideweb extensions
/research/projects
Here is a highlight of my most interesting projects