$ whoami
Rot256
My name is Mathias Hall-Andersen, I am a cryptology PhD student at Aarhus University (with Jesper Buus Nielsen). My primary interests are: cryptography, algebra, reverse engineering and anything which lies in the intersection. More broadly I have an interest in security and privacy enhancing technology. I sometimes play CTF with Kalmarunionen.
On this website I post my thoughts on cryptography related technical matters, projects I have been working on and write-ups for CTF challenges.
Education
| Period | Title | Institution |
|---|---|---|
| 2020 - 2023 (expected) | PhD in Computer Science | Aarhus University |
| 2017 - 2020 | Master in Computer Science | University of Copenhagen |
| 2019 (fall) | Master Thesis (Contingent Payments) | Aarhus University |
| 2018 (fall) | Exchange | ETH Zürich (D-INFK) |
| 2017 | Bachelor Thesis (Linear Cryptanalysis) | Technical University of Denmark |
| 2014 - 2017 | Bachelor in Computer Science | University of Copenhagen |
Work
| Period | Title | Institution |
|---|---|---|
| 2020 (fall) - 2023 | PhD Student | Aarhus University |
| 2022 (summer) | Internship | O(1) Labs |
| 2021 (summer) | Internship (Programming/Research, DARPA SIEVE) | Trail of Bits, Remote |
| 2020 (fall) | Instructor in Distributed Systems and Security | Aarhus University |
| 2020 (summer) | Internship (Programming/Research, DARPA SIEVE) | Trail of Bits, Remote |
| 2020 (spring) | External lecturer in Proactive Computer Security | University of Copenhagen |
| 2019 (fall) | Open source development on WireGuard-rs (Next-Generation Internet grant) |
NLnet |
| 2019 (spring) | Instructor in Proactive Computer Security | University of Copenhagen |
| 2018 (summer) | Internship (Security Consultant) | NCC Group, New York (Cryptography Services) |
| 2017 (fall) - 2018 | TA in Practical Cryptology | Technical University of Denmark |
| 2017 (summer) | Google Summer of Code | WireGuard (Linux Foundation) |
| 2016 (fall) | Instructor in Computer Systems | University of Copenhagen |
| 2016 | Student Assistant | Deloitte CRS |
| 2015 | Java programmer | Skandinaviska Enskilda Banken |
Research
- Count me in! Extendability for Threshold Ring Signatures for Asiacrypt 2022.
- Secure Multiparty Computation with Free Branching for Eurocrypt 2022.
- Stacking Sigmas: A Framework to Compose Σ-Protocols for Disjunctions for Eurocrypt 2022.
- Veksel: Simple, Efficient, Anonymous Payments with Large Anonymity Sets… for AsiaCCS 2022.
- Game Theory on the Blockchain: A Model for Games with Smart Contracts, for SAGT 2021.
- Generating Graphs Packed with Paths, for IACR-FSE-2019, video.
- nQUIC: Noise-Based QUIC Packet Protection, for EPIQ'18 (ACM)
Contact
| Platform | Alias |
|---|---|
| Github | https://github.com/rot256 |
| \(\text{math}\)\(\text{ias}\)\(@\)\(\text{hall-an}\text{dersen.dk}\) | |
| PGP Key | /key.asc or keybase.io, Fingerprint: 71e1ec2b778745710667d51dae331b20b3c8a5c2 |
| Website | rot256.dev – you are looking at it. |
| dblp | https://dblp.org/pid/225/9829.html |
Questions? Interesting projects? Feel free to drop me an email.