Isogeny Days 6

16 September 2025

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.
Additionally, the second day of the workshop closed out with a lightning talk session, in which Shernyce presented her ongoing work with Lorenz Panny on generalizing the construction of maximal orders in quaternion algebras in a five minute talk, and Sebastian and his collaborator Sebastiano Boscardin presented results from their new preprint „Exploring Kaneko’s bound: On multi-edges, loops and the diameter of the supersingular ℓ-isogeny graph” in two five minute talks.

Aktuelles

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.