Markus Schiffermüller
About Me
Hi, I am a first-year PhD student @ ISEC TU-Graz working on applied cryptography under the supervision of Maria Eichlseder. I worked on my Master’s thesis on privacy and censorship circumvention in the context of messaging applications at Spring @ EPFL. My last internship was in the cryptography team at Trail of Bits, where I worked on the security of open-source cryptography libraries. Before that, I worked in the cryptography research group at ISEC @ TUGraz on secure design for symmetric cryptographic primitives. I am interested in everything security-related and have a special interest in cryptography.
When I am not studying, I sometimes participate in Capture the Flag (CTF) competitions with my friends at LosFuzzys, of which I was the team Captain (from Jul 2022 - Oct 2023) and had the pleasure of participating in and organizing workshops, talks, and CTFs.
The opinions and views expressed on this blog are solely mine and do not represent those of any organization or individual. All information provided on this blog is for educational and informational purposes only.
Recent Posts
GlacierCTF 2025 - AES Zippy
This year, I once again had the opportunity to contribute to Glacier CTF for its fourth edition. The challenge, AES Zippy, is designed for players with intermediate familiarity with cryptography, specifically focusing on AES-GCM.
Glacierctf 2024 - AES Overdrive
I had the pleasure of providing a challenge for the third iteration of the Glacier 2024 event in the crypto category. It is a symmetric encryption challenge that is split into an easier first stage and a more challenging second stage, which revolves around symmetric cryptanalysis to recover a round key of AES.
Google CTF 2023 - myTLS
During the Google CTF 2023, my college and I encountered a fascinating challenge which was TLS themed. The task at hand involved exploiting files writes, hashes and signatures.