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SAIID EL HAJJ CHEHADE

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

EMAIL saiid.elhajjchehade@epfl.ch
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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!

| October 2025

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!

| August 2025

We developed an ethical server-side scanning tool, VSF🔁, that made it to IEEE S&P 2025🎉. Go give it a read!

| April 2025

Our exciting work on fingerprinting ad-blocker filter-lists 👀 got accepted at USENIX 2025.

| February 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.

| September 2024

Our work (My first paper 🎉) on Saliency-informed breakage detection got accepted at IEEE S&P 2024.

| April 2024

GET /research

/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 and I regularly poke the following components

browsers

server-side

web extensions

/research/projects

Here is a highlight of my most interesting projects

SINBAD

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Ad-blocker Breakage Detection

2024

extensions

FLFP

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Ad-blocker Filter-list Fingerprinting

2025

extensions

VSF

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Ethical Access Control Testing in the Wild

2025

server
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