Massimo Ostuzzi

Ph.D. student at Ruhr University Bochum, under the supervision of Alex May and Michael Walter. My research focus is public-key cryptanalysis.

Part of the EU project Marie Curie Doctoral Network QSI (Quantum Safe Internet).

Bachelor and Master in Mathematics from University of Padova.

Papers

Just Guess: Improved (Quantum) Algorithm for the Underdetermined MQ problem
Together with Alexander May and Henrik Ressler
Eurocrypt 2026
Snake Mackerel: An Isogeny-Based AKEM Leveraging Randomness Reuse
Together with Jonas Janneck, Jonas Meers and Doreen Riepel
Eprint
Multiple Group Action Dlogs with(out) Precomputation
Together with Alexander May
PKC 2025

Peer Reviewing Service

I served as a sub-reviewer for the following conferences:

IndoCrypt 2025

EuroCrypt 2026

Internships

IBM Research Zurich with Prof. Luca De Feo -- September25, October25.

TUM München with Prof. Lorenz Panny -- September24.

Teaching

Probabilistic Algorithms -- Winter23, Summer24

Seminar on Randomized Algorithsm -- Summer24

Cryptography -- Winter24, Winter25

Implementing Post-Quantum Standards and Challenges -- Winter24

Advanced Quantum Information and Computation -- Summer25

Talks

Just Guess -- OIST, Okinawa, Japan -- January 18th 2026

Just Guess -- IBM Research, Zurich, Switzerland -- September 1st 2025

Crittografia Moderna (in Italian) -- Liceo Quadri, Vicenza, Italy -- October 28th and 31st 2024

SQISign -- RUB Cryptanalysis Chair, Bochum, Germany -- June 6th 2024

Overview on Isogenies -- RUB Quantum Information Colloquium, Bochum, Germany -- April 16th 2024

Contact

Email: massimo [dot] ostuzzi [at] rub [dot] de