QSI Workshop

QSI Workshop

The MSCA Doctoral Network “Quantum Safe Internet” was pleased to host a focused workshop on techniques for a quantum-safe network infrastructure, including both post-quantum cryptography and quantum key distribution. The workshop took place from May 12 to 14, 2025, at the Technical University of Denmark in the Copenhagen area. It was organized by Christian Majenz and the Doctoral Candidate Fabrizio Sisinni. We thank all participants and contributors for their valuable input and engaging discussions.

Workshop Schedule

Monday, May 12:

09:30 – 10:00: Arrival.

10:00 – 10:30: (Un)breakable curses – re-encryption in the Fujisaki-Okamoto transform.

10:30 – 11:00: Coffee Break.

11:00 – 11:30: Masking Gaussian Elimination at Arbitrary Order, with Application to Multivariate- and Code-Based PQC.

11:30 – 12:00: Rudraksh: A compact and lightweight post-quantum key-encapsulation mechanism.

12:00 – 13:10: Lunch

13:10 – 13:50: Recent developments in quantum communication and quantum randomness.

13:50 – 14:20: Impact of Interferometers Mismatch and Laser Chirp on the Performance of a Time-Bin BB84 Quantum Key Distribution System.

————————————————————————————————————

Tuesday, May 13:

08:30 – 09:00: Arrival.

09:00 – 09:30: Hop-by-hop long-distance quantum key distribution with error detection.

09:30 – 10:00: Towards a unified security proof for prepare-and-measure quantum key distribution.

10:00 – 10:30: Coffee Break.

10:30 – 11:00: Tight error correction performance for CV-QKD in constrained storage devices.

11:00 – 11:30: Unclonable Encryption with Continuous Variables.

11:30 – 12:00: Network-wide Quantum Key Distribution with Onion Routing Relay.

12:00 – 13:10: Lunch.

13:10 – 13:50: How secure is quantum key distribution, really?

13:50 – 14:20: Tobias Gehring.

14:50 – 15:10: Coffee Break

15:10 – 15:40: Tight Statistical Bounds for Quantum Key Distribution.

15:40 – 16:10: Resource-efficient encoder for arbitrary time-bin state generation.

16:10 – 16:30: Break.

16:30 – End     Art Contest Ceremony.

————————————————————————————————————

Wednesday, May 14:  

08:30 – 09:00: Arrival.

09:00 – 09:30: On the average-case hardness of Boson Sampling.

09:30 – 10:00: Quantum pseudo resources imply cryptography.

10:00 – 10:30: Coffee Break.

10:30 – 11:00: Constructing Stable Optical Links for Coherent Quantum Communications.

11:00 – 11:30: Photonic Integrated Circuits for Scalable and Secure Quantum Key Distribution.

11:30 – 12:00: ML-DSA-OSH: An Efficient Hardware Implementation of ML-DSA.

12:00 – 13:10: Lunch.

13:10 – 13:50: Demonstration: DTU’s historic Enigma machine

13:50 – 14:20: NIST PQC update, and some challenges.

14:50 – 15:10: Connections between Complexity Theory and Cryptographic Memory-Hard functions.

15:10 – 15:40: The hunt for Post-Quantum Password Authenticated Key Exchange.

---

Speakers:

External Speakers: Gorjan Alagic, QuICS, Tobias Gering, DTU.

QSI Speakers: Porf. Giuseppe Vallone and Prof. Marcos Curty.

QSI Doctoral Candidates who offered a lecture: Fabrizio Sisinni, Javier Rey Domínguez, Álvaro Yángüez, Loïc Millet, Alessandro Marcomini, Sergio Juárez, Vaisakh Mannalath, Shashank Kumar, Matías R. Bolaños, Gina Muuss and Silvia Ristch.