[Qsi_beneficiaries] QSI: Newsletter.

Mie Oct 1 15:16:39 CEST 2025

Dear all, 

We hope this message finds you well.

We are pleased to share with you the next newsletter, which **we will officially launch on Wednesday, October 8**. The newsletter aims to keep the general public informed about our project updates, upcoming events, and highlights from our community.

Before the release, we would appreciate it if you could take a moment to review this version (see below). Any comments, suggestions, or corrections are more than welcome.

Please send us **your feedback by Tuesday, October 7**, so we can incorporate any final adjustments.

Thank you for your support and collaboration.

Best regards,

Lorena G. Curra

**Project Manager QSI **

**https://quantum-safeinternet.com**

**T **+34 986 130 060

**E **lcurra en vqcc.uvigo.es mailto:lcurra en vqcc.uvigo.es 

-------- Mensaje reenviado -------

De: noreply en quantum-safeinternet.com mailto:noreply en quantum-safeinternet.com 
Para: lcurra en vqcc.uvigo.es mailto:lcurra en vqcc.uvigo.es 
Enviado: 1 de octubre de 2025, 15:09
Asunto: Newsletter 3, September 2025.

View this in your browser. https://quantum-safeinternet.com/?mailpoet_router&endpoint=view_in_browser&action=view&data=WzI5LCJhZDVmN2RlNDc1MGIiLDAsMCwwLDFd   

 	 QSI is a European project funded by the European Union’s Horizon Europe research and innovation programme under the Marie Skłodowska-Curie grant agreement n° 101072637. 

# QUANTUM-SAFE INTERNET

 	 **WHAT IS QSI ABOUT?** 

 	 Quantum-safe Internet aims at training a world-class cohort of Doctoral Candidates capable of taking the next essential steps in the highly demanding area of cybersecurity.   

 	 QSI has been designed with the following principal training objectives for our Doctoral Candidates:   

 * To train them in relevant Quantum-Safe technologies.
 * To provide them with enhanced appreciation for implementing scientific results.
 * To secure their career prospects.
 * To enhance the competitiveness of the EU.

 	 MORE INFO https://quantum-safeinternet.com/about/  

 * **QSI at the Osaka World Expo 2025, Japan.**
 * **Science Art Contest Winners!**
 * **Our next Conference, Paris 2026. **
 * **Enjoy our last Stories of the Month.**
 * **Research Outcomes. **
 * **Members. **

##  QSI at the Osaka World Expo 2025 Osaka, Japan.

 	 QSI was present at Expo 2025 in Osaka, Japan, as part of the thematic week **‘Peace, Human Security and Dignity’**, held from August 8 to 12, at the EU Pavilion.  

 	 The project was represented by the PhD candidates Alessandro Marcomini https://quantum-safeinternet.com/team/alessandro-marcomini/  and Vaisakh Mannalath https://quantum-safeinternet.com/team/vaisakh-mannalath/  from the University of Vigo, alongside the supervisors Alex B. Grilo https://quantum-safeinternet.com/team/alex-bredariol-grilo/  (Sorbonne University, Paris) and Prof. Christian Majenz https://quantum-safeinternet.com/team/christian-majenz/  (Technical University of Denmark). In addition, QSI received support from its partners in Japan, Prof. Kiyoshi Tamaki https://quantum-safeinternet.com/team/kiyoshi-tamaki/  (University of Toyama) and Koji Azuma  https://quantum-safeinternet.com/team/koji-azuma/ (NTT).

 	 We offered a scientific program and outreach activities https://quantum-safeinternet.com/qsi-at-the-osaka-world-expo-august-2025-japan-2/ , including:   

 * **Talks and presentations.**
 * **Audiovisual screenings** showcasing the individual projects of the PhD candidates. See here. https://www.youtube.com/channel/UCASleSV0SygVxTxdGBvW9UA 
 * **Interactive workshops and engaging activities.**

## SCIENCE ART CONTEST WINNERS!

 	 Participants were invited to submit works of art in any form, such as poetry, music, design, painting, sculpture or video, focusing on a scientific theme related to Quantum-Safe 
Internet. All works were displayed at the QSI workshop held in Denmark, from 12 to 16 May 2025. 

 	 The **first prize **was awarded to Margarida Pereira https://vqcc.uvigo.es/team/margarida-pereira/  for her spectacular painting, the description of her artwork is here https://quantum-safeinternet.com/qsi-science-art-contest/ . 

 	 The** second prize **went to Diana Cencer https://www.linkedin.com/in/dianagarafova/  for her original and well-crafted video, available here. https://youtu.be/pzDDRZOtaLU?si=_aFSjKA32epdd42e 

**Congratulations to both and thank you for participating!**

*The winning works of art were exhibited at *Osaka World Expo 2025, Japan.  

##  QSI Conference 2026, Paris.

 	 In the spring of 2026, the final event of the MSCA Quantum-Safe Internet project will take place in Paris, organized by the University of Sorbonne. As part of the conference program, the last outreach activity to be carried out by the Doctoral Candidates will also be held. 

 	 We will keep you updated here https://quantum-safeinternet.com/dissemination/conferences-schools/  !   

## Enjoy the latest Stories of the Month

 * July 2025: **"Just Guess! Improved Algorithm for underdetermined MQ solving"**, by Massimo Ostuzzi. https://quantum-safeinternet.com/team/massimo-ostuzzi/ 
 *  August 2025: **"When Eve wins by making Bog go quiet"**, by Loïc Millet https://quantum-safeinternet.com/team/loic-millet/ . 
 * September 2025: Coming soon. Stay tuned! 

 	 Story of the Month https://quantum-safeinternet.com/dissemination/story-of-the-month/  

## Results and Research Outcomes: 

 * S. Juárez, A. Marcomini, M. Petrov, R. I. Woodward, T. J. Dowling, R. M. Stevenson, M. Curty, and D. Rusca, “On the Implementation Security of Twin-Field Quantum Key Distribution using Optical Injection Locking”, (2025). Preprint can be found at: **arXiv:2508.21763 https://arxiv.org/abs/2508.21763  **
 * A. B. Grilo, A. Yángüez, “Quantum pseudoresources imply cryptography” (2025). Preprint can be found at: **arXiv: 2504.15025 https://arxiv.org/pdf/2504.15025 **
 *  J. Janneck, J. Meers, M. Ostuzzi, and D. Riepel “Snake Mackerel: An Isogeny-Based AKEM Leveraging Randomness Reuse”, 2025. Preprint can be found at: https://eprint.iacr.org/2025/1474.pdf
 * B. Lopes da Costa, M. R. Bolaños, R. Chaves, C. Narduzzi, M. Avesani, D. Giacomo Marangon, A. Stanco, G. Vallone, P. Villoresi, Y. Omar, “Power-consumption Backdoor in Quantum Key Distribution”. Accepted for publication in Physical Review Applied:  https://arxiv.org/abs/2503.11767
 * K. Vijayadharan, M. R. Bolaños, M. Avesani, G. Vallone, P. Villoresi, C. Agnesi, “A Sagnac-based arbitrary time-bin state encoder for quantum communication applications” (2025). Preprint can be found at: https://arxiv.org/abs/2506.08971
 * J. Rey-Domínguez and M. Razavi, “Rethinking Quantum Repeaters: Balancing Scalability, Feasibility, and Interoperability” (2025). Pre-print can be found at: https://arxiv.org/abs/2508.16310
 * K. Hövelmanns, A. Hülsing, C. Majenz, and F. Sisinni. (Un)-breakable curses – re-encryption step in the Fujisaki-Okamoto transform. Cryptology ePrint Archive, Report 2025/299. https://eprint.iacr.org/2025/299
 * V. Mannalath, V. Zapatero, M. Curty, “Sharp Finite Statistics for Quantum Key Distribution”, Physical Review Letters 135, 020803 (2025). https://doi.org/10.1103/l735-x48g https://journals.aps.org/prl/abstract/10.1103/l735-x48g  
 * Á. Yángüez, T. A. Hahn, J. Kochanowski, “Efficient Quantum Measurements: Computational Max- and Measured Rényi Divergences and Applications”. Preprint can be found at: Arxiv:2509.21308. https://arxiv.org/abs/2509.21308  
 * A. B. Grilo, L. Hanouz, A. Marin “Security of a secret sharing protocol on the Qline” (2025). Preprint can be found at: arXiv:2504.19702v1 https://arxiv.org/abs/2504.19702v1 

 * 

### CONFERENCES:

 * J. Rey-Domínguez and Mohsen Razavi, “Quantum key distribution over an encoded repeater chain with sequential swapping”, International Conference on Quantum Communications, Networking, and Computing (QCNC2025) at Nara, Japan, March 31st – April 2nd, 2025.
 * J. Rey-Domínguez and M. Razavi, “Hop-by-hop long-distance quantum key distribution with error detection”, poster in QCrypt 2025, Sanya, China, 25-29 August 2025.
 * V. Mannalath, V. Zapatero, M. Curty, “Sharp finite statistics for quantum key distribution”, 15th international conference on quantum cryptography (QCRYPT 2025), Sanya, Hainan, China, 25-29 August 2025.
 * A. Marcomini, A. Mizutani, F. Grünenfelder, M. Curty, K. Tamaki, “Security of loss-tolerant QKD with source and receiver imperfections”, 15th international conference on quantum cryptography (QCRYPT2025), Sanya, Hainan, China, 25-29 August 2025.

 	 **OUR BENEFICIARIES:** 

 	 **OUR ASSOCIATED PARTNERS:** 

 	 QSI is a European project funded by the European Union’s Horizon Europe research and innovation programme under the Marie Skłodowska-Curie grant agreement n° 101072637. 

 	 Contact Information: 

Lorena g. Curra; lcurra en vqcc.uvigo.es 

 	 QSI ® 2025 All rights reserved. 

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