Sessions on QCrypt Conference Website

After dinner talk: Two quantum tales

Mon, 01 Jan 0001 00:00:00 +0000

Biography

Gilles Brassard obtained a PhD in Computer Science from Cornell University in 1979. He has been a professor at Université de Montréal ever since. Throughout his career, Professor Brassard has had a passionate interest in all aspects of quantum information science, a field he largely contributed to creating by combining the principles of quantum theory and computer science. He invented quantum cryptography, which enables the unconditionally secure transmission of information, and quantum teleportation, for which he was predicted to receive the Nobel Prize in Physics by Thomson Reuters (now Clarivate). A video produced by Québec Science and the Fonds de recherche du Québec as part of the “Que sont devenues nos découvertes de jadis?” series tells the story of his discovery of quantum teleportation together with Claude Crépeau formerly from McGill University (now at the École de technologie supérieure), which was named as one of the 10 discoveries of the year in 1993 by Québec Science.

Awards and Business Meeting

Mon, 01 Jan 0001 00:00:00 +0000

Best Student Paper Awards

Theory

Congratulations to Amir Arqand for Marginal-constrained entropy accumulation theorem with co-author Ernest Y.-Z. Tan.

paper

Experiment

Congratulations to Giulia Guarda and Noemi Tagliavacche for Frequency-bin entanglement-based quantum key distribution with co-authors Massimo Borghi, Domenico Ribezzo, Marco Liscidini, Davide Bacco, Matteo Galli, Daniele Bajoni

Banquet

Mon, 01 Jan 0001 00:00:00 +0000

Closing Remark

Mon, 01 Jan 0001 00:00:00 +0000

Coffee Break

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Contributed Talk 2a

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Contributed Talk 2b

Mon, 01 Jan 0001 00:00:00 +0000

Contributed Talk 3a (original 2c)

Mon, 01 Jan 0001 00:00:00 +0000

Contributed Talk 3b (original 3a)

Mon, 01 Jan 0001 00:00:00 +0000

Contributed Talk 3c (original 1a)

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Contributed Talk 4a

Mon, 01 Jan 0001 00:00:00 +0000

Contributed Talk 4b

Mon, 01 Jan 0001 00:00:00 +0000

Contributed Talk 4c (original 4b)

Mon, 01 Jan 0001 00:00:00 +0000

Contributed Talk 5a

Mon, 01 Jan 0001 00:00:00 +0000

Contributed Talk 5b

Mon, 01 Jan 0001 00:00:00 +0000

Dinner

Mon, 01 Jan 0001 00:00:00 +0000

Group photo & Poster (Even Number)

Mon, 01 Jan 0001 00:00:00 +0000

Posters can mounted in C Hall (next to the conference venue D Hall) after 5 p.m. on Sunday, August 24th.
All posters are recommended to remain on display throughout the conference until its end.
On Tuesday, August 26th, even-numbered posters are required to have their poster presentation.
On Wednesday, August 27th, odd-numbered posters are required to have their poster presentation.

Industry Panel

Mon, 01 Jan 0001 00:00:00 +0000

The session is intended to provide a comprehensive view of the standardization of quantum information and quantum key distribution. It is organized and chaired by Charles Lim (National University of Singapore).

Invited Talk: A General Quantum Duality for Representations of Groups with Applications to Quantum Money, Lightning, and Fire

Mon, 01 Jan 0001 00:00:00 +0000

Biography

Barak Nehoran is a Ph.D. candidate in theoretical computer science at Princeton University, co-advised by Professors Ran Raz and Mark Zhandry. His research focuses on quantum information, cryptography, and complexity theory, studying how quantum phenomena can enable cryptographic tasks that have no classical counterpart.

Abstract

Aaronson, Atia, and Susskind (2020) established that efficiently mapping between quantum states |ψ⟩ and |φ⟩ is computationally equivalent to distinguishing their superpositions 1/√2(|ψ⟩ + |φ⟩) and 1/√2(|ψ⟩ − |φ⟩). We generalize this insight into a broader duality principle in quantum computation, wherein manipulating quantum states in one basis is equivalent to extracting their value in a complementary basis. In its most general form, this duality principle states that for a given group, the ability to implement a unitary representation of the group is computationally equivalent to the ability to perform a Fourier extraction from the invariant subspaces corresponding to its irreducible representations.

Invited Talk: Anonymous communication in quantum networks

Mon, 01 Jan 0001 00:00:00 +0000

Biography

Gláucia Murta is an Assistant Professor at the Atominstitut of TU Wien, where I lead the research group on Quantum Foundations and Cryptography. Our work explores fundamental aspects of quantum correlations and their applications to quantum cryptography. In particular, we investigate how steering and Bell nonlocality can be harnessed to develop protocols that are inherently resilient to hacking and device imperfections. We also study how multipartite entanglement and high-dimensional systems can overcome the limitations of bipartite qubit-based protocols, enabling more efficient cryptographic schemes and new quantum functionalities.

Invited Talk: Field trial of TF-QKD using independent optical frequency combs

Mon, 01 Jan 0001 00:00:00 +0000

Biography

Dr Lai Zhou is an Associate Researcher at the Beijing Academy of Quantum Information Sciences. He received his B.S. and Ph.D. degrees from Tsinghua University and completed his postdoctoral research at the University of Oxford. His research focuses on long-distance quantum key distribution and quantum networks. He has published in several journals, including Physical Review X, Physical Review Letters, and Nature Communications. Dr. Zhou has also served on the Program Committee of QCrypt in both 2024 and 2025.

Invited Talk: Long-range quantum correlations and DIQKD in routed Bell scenarios

Mon, 01 Jan 0001 00:00:00 +0000

Biography

Jef Pauwels is a postdoctoral researcher at the University of Geneva and Constructor University. He obtained his PhD in 2023 at the Université libre de Bruxelles. His research focuses on quantum correlations, entangled measurements, and (semi-)device-independent protocols.

Abstract

Transmission loss remains a major obstacle for long-distance demonstrations of nonlocality and device-independent applications. In this talk, I will discuss routed Bell experiments, in which a particle sent to one party in a Bell experiment can be measured either near or far from the source, as a promising approach to overcoming this challenge. I will explain how to characterize correlations in routed setups, how to compute device-independent key rates, and present a routed Bell inequality that can be violated by qubit entanglement with arbitrary loss.

Invited Talk: Microsatellite-based quantum key distribution and beyond

Mon, 01 Jan 0001 00:00:00 +0000

Biography

Yang Li received his PhD from the University of Science and Technology of China (USTC) in 2016, where he currently serves as an associate researcher. His general research interests lie within quantum key distribution and quantum cryptography, with particular emphasis on experimental implementations of free-space and satellite-based QKD systems.

Abstract

Quantum key distribution (QKD) enables secure communication guaranteed by the fundamental laws of physics. While the Micius satellite has verified the feasibility of satellite-based QKD, deploying large-scale quantum constellations remains a challenge, requiring miniaturized satellites, portable ground stations, and real-time key exchange. To this end, I will present the development and launch of a quantum microsatellite and the subsequent demonstration of real-time satellite-ground QKD with multiple small-aperture, portable ground stations. During a single satellite pass, we generated a secure key of up to 1.07 million bits. Also, a secret key, enabling one-time pad encryption of images, is created between China and South Africa at locations separated by over 12,900 kilometers on Earth. This achievement represents a critical step toward a practical global quantum network. I will also present our ongoing progress in demonstrating daylight QKD, as well as the developments of a low-Earth-orbit satellite constellation prototype and a high-Earth-orbit quantum satellite.

Invited Talk: Optical Quantum Network using Drones

Mon, 01 Jan 0001 00:00:00 +0000

Biography

Zhenda Xie has long been engaged in research on optoelectronic integrated chip devices and UAV optical quantum networks. He has published over 100 papers in international academic journals such as National Science Review, Nature Photonics, Physical Review Letters, and Nature Communications. He received the First Prize of Natural Science from the Ministry of Education in 2020 (3/5) and was honored as one of the “Top Ten Youth Science and Technology Stars of Jiangsu Province” at the 18th Jiangsu Youth Science and Technology Award. His achievement in drone-based entangled photon distribution was selected as one of the Top 10 Social Impact Events in China’s Optics Field in 2021 (Light10). As a key contributor, he has won the Gold Medal at the International Exhibition of Inventions of Geneva four times.

Invited Talk: Quantum secure microwave communication

Mon, 01 Jan 0001 00:00:00 +0000

Biography

Kirill Fedorov received his PhD from the Karlsruhe Institute of Technology (Germany) in 2013 and he is currently a principal investigator at Walther-Meissner-Institut and a lecturer (Privatdozent) at Technical University of Munich. His general research interests lie within experiments with superconducting quantum circuits and propagating quantum microwaves. In particular, he focuses on realization of quantum networks in the microwave regime with a particular emphasis on quantum sensing and quantum key distribution protocols.

Invited Talk: Surpassing the loss-noise robustness trade-off in QKD

Mon, 01 Jan 0001 00:00:00 +0000

Biography

Hannah Seabrook is a PhD student at the University of Bristol. Her research lies at the interface of quantum foundations and quantum technologies, with particular interest in applying concepts such as indefinite causality and device independence to practical contexts. One of her current research directions focuses on how foundational insights can inform the design of noise-resilient QKD schemes by connecting theoretical developments with practical implementation challenges. She previously completed a research internship at the Max Planck Institute for Quantum Optics and received her BA and MSci in Natural Sciences from the University of Cambridge in 2022.

Lunch

Mon, 01 Jan 0001 00:00:00 +0000

Poster (Odd Number)

Mon, 01 Jan 0001 00:00:00 +0000

Posters can mounted in C Hall (next to the conference venue D Hall) after 5 p.m. on Sunday, August 24th.
All posters are recommended to remain on display throughout the conference until its end.
On Wednesday, August 27th, odd-numbered posters are required to have their poster presentation.
On Tuesday, August 26th, even-numbered posters are required to have their poster presentation.

Public Lecture: Dream or Reality? Quantum Information Processing the Past, Present and Beyond

Mon, 01 Jan 0001 00:00:00 +0000

Jian-Wei Pan, born on 11 March 1970, received his Bachelor (1992) and Master (1995) in Physics from the University of Science and Technology of China, Hefei, and his PhD (1999) from the University of Vienna. He is currently a Professor of Physics at the University of Science and Technology of China, an Academician of Chinese Academy of Sciences (CAS), a Fellow of the World Academy of Sciences (TWAS) and a foreign member of the Royal Society (London). He serves as the Director of the CAS Center for Excellence in Quantum Information and Quantum Physics.

Tutorial Talk: Advances in Quantum Random Number Generation

Mon, 01 Jan 0001 00:00:00 +0000

Biography

Prof. Giuseppe Vallone is Full Professor at the Department of Information Engineering, University of Padova, Italy. He obtained his M.S. degree in physics and Ph.D. in theoretical physics from the University of Torino, Italy, in 2002 and 2006, respectively. He has been a permanent faculty member at the University of Padova since 2011 and was promoted to Full Professor in February 2024. His research focuses on quantum information, experimental quantum optics, and quantum communication. He co-authored more than 130 peer-reviewed publications and has been involved in more than 30 scientific research projects. He is also the co-founder and Chief Technology Officer of ThinkQuantum, a spin-off company of the University of Padova.

Tutorial Talk: Quantum position verification: where are we now?

Mon, 01 Jan 0001 00:00:00 +0000

Biography

Florian Speelman is assistant professor at the Theoretical Computer Science group of the University of Amsterdam and affiliated with the QuSoft research center for quantum computing. His research interests include cryptographic protocols for quantum networks, quantum complexity theory, and theoretical questions in quantum communication.

Abstract

Location can be strongly correlated to trust and identity: For example, when visiting a bank, you might trust the teller just by virtue of her position behind the counter. We would like to be able to use position as a cryptographic credential, being able to encrypt messages that can only be read at a certain location, or signing messages so that we are sure that they are sent from a promised spot.

Tutorial Talk: Security proofs for decoy-state BB84 and their performance

Mon, 01 Jan 0001 00:00:00 +0000

Biography

Devashish Tupkary received his undergraduate degree in Physics from the Indian Institute of Science, Bengaluru, in 2020. He completed his Master’s in Physics at the Institute for Quantum Computing, University of Waterloo, in 2022, where he is currently pursuing a PhD. His research focuses on the security analysis of practical quantum key distribution (QKD) protocols. He has a broad interest in all areas of cryptography.

Abstract

Protocol security of quantum key distribution (QKD) protocols refers to the derivation of a rigorous mathematical statement asserting the security the protocol, starting from a precise mathematical model of the protocol. In this tutorial, we will introduce key concepts required to construct such proofs. We will highlight common gaps in the existing literature and discuss how they can be addressed. We will provide a brief overview of the different security proof techniques available, outlining how they work and comparing their strengths and limitations.

Tutorial Talk: Twin-field quantum key distribution experiments

Mon, 01 Jan 0001 00:00:00 +0000

Biography

Yang Liu works on experimental quantum communication in Jinan Institute of Quantum Technology (JIQT). He demonstrate measurement-device-independent quantum key distribution (MDI-QKD), eliminating the most critical security vulnerability in practical QKD systems. The work was selected asHighlights of the Year by the American Physical Society in 2013. He develops the key technologies of wavelength calibration and phase compensation for independent light sources, demonstrate the feasibility of twin-field (TF) QKD. He develops the method to control the critical noise in TF-QKD systems, achieving a quantum key distribution demonstration over 1,002 kilometers. Furthermore, the work demonstrated that the phase-sensitive TF-QKD can be used to detect vibrations in fiber optic links. He experimentally developed high-efficiency entanglement sources to achieve loophole-free Bell inequality violation, demonstrate device-independent (DI) quantum random number generation (QRNG) in experiment. The randomness beacon (https://randomnessbeacon.com/) based on this work may provide truly physics-based, high-security random number services.

Welcome Remark

Mon, 01 Jan 0001 00:00:00 +0000