Simon
Einzinger

Researches side channels. Plays CTFs, and builds Attack/Defense CTF infrastructure with saarsec and Attacking Lab.

Cybersecurity Student
Saarland University

A 24-year-old student, amateur CTF player and wannabe DevOps/Cloud engineer, writing about challenges and other IT-related topics. I also run a K3S homelab cluster that, among other things, serves this website.

PublicationsAll publications →
Accepted · 48th IEEE Symposium on Security and Privacy

Zepade Attacks: Exploiting Zero-Page Deduplication for Side-Channel Attacks

May 17–20, 2027
Latest write-upsAll write-ups →
Write-Up

b01lersctf/bctf-infra

A writeup on the misc/bctf-infra challenge from b01lersctf. My solution races shutil.copytree, which first copies files and only applies file permissions afterwards.

Oct 28, 2026