QuSAC News

Research Visit from UNSW Sydney

In October, the QuSAC Lab welcomed three visitors from the University of New South Wales (UNSW Sydney): Associate Professor Sushmita Ruj, PhD candidate Varpreet Singh Dhaliwal, and student Joseph Hilsberg. During their research visit, we worked together on the design, implementation, and benchmarking of anonymous credential systems built from digital signature schemes and generic proof systems.

Leuven Isogeny Days 7

Shernyce Duncombe, Marzio Mula and Sebastian Spindler recently participated in the seventh edition of the Leuven Isogeny Days from September 16th to 18th. This yearly workshop brings together researchers of the isogeny-based cryptography community from all over the world to discuss the most significant research results of the year and to explore new research ideas in smaller focused brainstorming groups.

From Gothenburg to Dagstuhl: Digital Signatures and Post-Quantum Anonymous Credentials

From September 4 to 11, 2026, two consecutive research visits took Daniel Slamanig first to Chalmers University of Technology in Gothenburg and then to the Dagstuhl Seminar on “Real-World Cryptography.”

AM-PQC 2026

From August 10th to August 14th Sebastian Spindler participated in the “AM-PQC 2026” workshop  in Ohrid. The workshop brought together researchers from the areas of multivariate, isogeny-based and code-based cryptography to discuss current breakthroughs and new research directions in the world of post-quantum cryptography, both in smaller brainstorming groups and through invited and contributed talks.

Successful IWSPA 2026 Workshop on Security and Privacy Analytics

On June 24, 2026, the 12th ACM International Workshop on Security and Privacy Analytics (IWSPA 2026) was held in Frankfurt, Germany, as a co-located workshop of ACM CODASPY 2026. The workshop was co-organized by Daniel Slamanig (University of the Bundeswehr Munich) and Amutheezan Sivagnanam (University of Houston).

Interview with Prof. Daniel Slamanig in the 3sat science magazine nano

Prof. Daniel Slamanig was recently interviewed by the German science magazine nano (3sat) on the timely topic of online age verification. The segment discusses technical and privacy-related challenges of various age-verification mechanisms and provides a critical assessment of their practical effectiveness. The feature, entitled The Dark Side of Online Age Verification, examines different approaches to age verification and their limitations in practice.

PrivCrypt 2026 @ EUROCRYPT 2026

Together with Lucjan Hanzlik (CISPA) and Tjerand Silde (NTNU), Daniel Slamanig co-organized the PrivCrypt 2026 last week in Rome, co-affiliated with Eurocrypt 2026! It was a pleasure to bring together a fantastic community of over 140 registered participants working on privacy-enhancing cryptography, anonymous credentials, zero-knowledge proofs, post-quantum cryptography, and privacy-preserving systems.

Dagstuhl Seminar "Privacy-Preserving Authentication"

Prof. Slamanig recently participated in the Dagstuhl Seminar titled "Privacy-Preserving Authentication," held from April 19 to April 24, 2026. Dagstuhl seminars are held at Schloss Dagstuhl – Leibniz-Zentrum für Informatik and are invitation-based research workshop where around 30–40 scientists spend a week discussing a focused topic in computer science.

PQCrypto 2026

From April 14th to April 16th Sebastian Spindler attended the 17th edition of the PQCrypto conference, which was held in Saint-Malo. The conference program covered a wide range of recent advances in post quantum cryptography, such as new signature scheme constructions, the cryptanalysis of both various security assumptions and some concrete constructions, as well as talks about quantum security and the general design of protocols in view of the ongoing transition to post quantum cryptography.

YRCS 2026

From the 18th until the 20th of March, the Young Researcher Crypto Seminar (YRCS) was held at the Hasso-Plattner-Institut in Potsdam. Researchers from the QuSAC group attended to present and discuss ongoing research. Thomas den Hollander presented the QuSAC group's recent work on proving knowledge of isogenies.

Swissogeny Day 2026

On 20 March 2026, QuSAC researcher Marzio Mula gave a talk at the Swissogeny Day 2026, hosted at IBM Research Zurich. In his talk, “SNARK Magic and Other Tricks for Proving Isogeny Knowledge”, Marzio presented recent work on non-interactive zero-knowledge proofs of knowledge of isogenies. Such proofs are useful to demonstrate the possession or well-formedness of cryptographic public keys, to support multiparty generation of supersingular elliptic curves with unknown endomorphism ring, and as building blocks digital signatures.

MSCA Postdoctoral Fellowship Awarded to Dr. Marzio Mula

We are delighted to announce that QuSAC researcher Dr. Marzio Mula has been awarded a Marie Skłodowska‑Curie Action (MSCA) Postdoctoral Fellowship. Marzio will join the CANARI team at Inria Bordeaux and the Institut de Mathématiques de Bordeaux for a two‑year fellowship with his project IsoPODS (Isogeny‑Based Primitives, Optimisations, and Dynamical Systems).

OIST Visiting Program

From January 13th to January 26th Sebastian Spindler participated in the first two weeks of the OIST Thematic Program “Isogeny-based Cryptography” in Onna (Okinawa, Japan). The mornings started off with many interesting research talks, and afterwards the participants formed smaller groups to brainstorm on various topics in the current landscape of isogeny-based cryptography.

Asiacrypt 2025

From the 8th until the 12th of December, members of the QuSAC group visited Asiacrypt, the largest cryptography conference of Asia. The 2025 edition took place in Melbourne, Australia. It was a valuable opportunity to speak with other researches and learn about recent research. In total, 3 papers accepted at the conference were (co-)authored by members of the QuSAC group.

Swissogeny Day Lausanne

On November 26th Shernyce Duncombe, Marzio Mula and Sebastian Spindler participated in the fourth edition of the Swissogeny Day, which was hosted at the EPFL in Lausanne. The one-day workshop kicked off with research talks on generalized lollipop attacks, an alternative approach to SQIsign incorporating level structures, and an attack on the active security of PEARL-SCALLOP.

Research Visit and Seminar Talks @ INRIA Bordeaux

In November 2025, two researchers from the QuSAC lab, Marzio Mula and Sebastian Spindler, visited the CANARI project-team at Inria Bordeaux and the Institut de Mathématiques de Bordeaux. During their stay, they gave two seminar talks at the Algorithmic Number Theory Seminar (Séminaire de Théorie Algorithmique des Nombres).

Invited Speaker at the Australian Summer School on Privacy 2025

Prof. Daniel Slamanig was an invited speaker at the Australian Summer School on Privacy 2025, held at the University of New South Wales (UNSW) in Sydney. The summer school brought together students, researchers, and practitioners from academia and industry to explore current developments in privacy-enhancing technologies, including topics such as cryptography for privacy, differential privacy, usable privacy, and AI privacy.

Talk @ Crypto 2025

On August 18th, Sebastian Spindler presented the paper “More Efficient Isogeny Proofs of Knowledge via Canonical Modular Polynomials”, which arose from a collaboration between the QuSAC group and CODE colleague Sören Kleine, remotely during the 45th edition of the CRYPTO conference.

Isogeny Club

On October 7th, Sebastian Spindler gave the online talk “Counting ℓ-isogenies with different modular polynomials” as part of the seventh season of the Isogeny Club. The talk covered both the CRYPTO paper “More Efficient Isogeny Proofs of Knowledge via Canonical Modular Polynomials”, which is a joint work of the QuSAC group and CODE colleague Sören Kleine, as well as subsequent, not yet published follow-up work that investigates other modular polynomials.

Crypto Day

On September 25th and 26th, Sebastian Spindler participated in the 39th Crypto Day, which was hosted by the genua GmbH in Kirchheim near Munich. At the event, Sebastian had the opportunity to converse with researchers from other universities and from the industry mainly about practical aspects of cryptography. Additionally, in his talk “Isogeny Proofs of Knowledge – A Survey” Sebastian gave an overview over the evolution of proofs of knowledge for isogeny paths over the last two years.

Isogeny Days 6

From September 10th to 12th, Marzio Mula, Shernyce Duncombe and Sebastian Spindler attended the sixth edition of the isogeny days in Leuven. Each day of the workshop was separated into two parts: In the morning current research results and ongoing projects in isogeny-based cryptography were presented by various researchers, whereas in the afternoon new research ideas were explored in smaller brainstorming groups.

Young Researcher Crypto Seminar

From September 1st to 3rd, Sebastian Spindler attended the Young Researcher Crypto Seminar in Karlsruhe, where he met with fellow early career researchers to discuss current developments in cryptology. In his talk “The supersingular (ℓ-)isogeny graph”, Sebastian furthermore presented his preprint “Exploring Kaneko’s bound: On multi-edges, loops and the diameter of the supersingular ℓ-isogeny graph”, which he published in the IACR Cryptology ePrint Archive together with Sebastiano Boscardin from the Eindhoven University of Technology.

3 Papers accepted at ASIACRYPT 2025

This year, three papers by the QUSAC group were accepted at the renowned ASIACRYPT conference. The 31st edition of the International Conference on the Theory and Application of Cryptology and Information Security – ASIACRYPT 2025 – will take place this year from December 8-12 in Melbourne, Australia. Below are brief summaries of the three accepted papers:

BIRS workshop “Isogeny Graphs in Cryptography”

From August 3rd to 8th, Sebastian Spindler attended the workshop “Isogeny Graphs in Cryptography” in Canada. In his lightning talk “On the diameter of the supersingular ℓ-isogeny graph” Sebastian presented part of his new preprint “Exploring Kaneko’s bound: On multi-edges, loops and the diameter of the supersingular ℓ-isogeny graph” that he recently published together with Sebastiano Boscardin from the Eindhoven University of Technology.

Attending ArcticCrypt 2025

From July 6th to 11th, the QuSAC group attended the 2025 edition of ArcticCrypt – the world’s northernmost cryptography conference – in Longyearbyen, Svalbard. Prof. Slamanig was invited to chair the conference's session on "Mathematical Aspects of Cryptography", and Sebastian Spindler presented the paper “More Efficient Isogeny Proofs of Knowledge via Canonical Modular Polynomials”.

ACNS 2025 & PrivCrypt 2025

The 23rd International Conference on Applied Cryptography and Network Security (ACNS 2025) was held in Munich, Germany, at the Munich Urban Co-Lab on 23–26 June 2025. In this year’s edition, Prof. Slamanig served as the Poster Chair of the conference.

CrypTO Conference

A researcher from the QuSAC lab (Marzio Mula) attended the CrypTO Conference in Turin, held on May 22–23, 2025. He presented the talk “Representing isogenies via (classical, canonical, Atkin...) modular polynomials”, based on joint work with the QuSAC group, Marc Houben, and Sören Kleine.

EUROCRYPT 2025 and Inivted Talk at CTB'25

From May 4th to 8th, the 44th edition of Eurocrypt — one of the world’s leading scientific conferences in the field of cryptography took plase at the RIU Hotel in Madrid, Spain. Each year, the event showcases the most significant advances in cryptographic research.

Paper accepted at CRYPTO 2025

The paper "More Efficient Isogeny Proofs of Knowledge via Canonical Modular Polynomials" by the QuSAC group and CODE colleague Sören Kleine has been accepted for publication at the CRYPTO 2025 conference, which will take place in Santa Barbara, USA on August 17-21, 2025.

SQIparty2025 in Lleida

Last week Sebastian Spindler attended the SQIparty2025, a workshop on isogeny-based cryptography that was held in Lleida, Spain on April 28-30, 2025. Between many interesting talks on SQIsign, higher-dimensional techniques as well as related topics and the more interactive skillshare sessions, the workshop provided the perfect opportunity to learn about and discuss current developments in isogeny-based cryptography, even in the face of the countrywide power outage in Spain.