TY - JOUR
T1 - Unconditionally secure digital signatures implemented in an eight-user quantum network
AU - Pelet, Yoann
AU - Puthoor, Ittoop Vergheese
AU - Venkatachalam, Natarajan
AU - Wengerowsky, Sören
AU - Lončarić, Martin
AU - Neumann, Sebastian Philipp
AU - Liu, Bo
AU - Samec, Željko
AU - Stipčević, Mario
AU - Ursin, Rupert
AU - Andersson, Erika
AU - Rarity, John G.
AU - Aktas, Djeylan
AU - Joshi, Siddarth Koduru
N1 - Funding Information:
The research leading to this work has received funding from United Kingdom Research and Innovation’s (UKRI) Engineering and Physical Science Research Council (EPSRC) Quantum Communications Hub (Grant Nos. EP/M013472/1, EP/T001011/1) and equipment procured by the QuPIC Project (EP/N015126/1). We also acknowledge the Ministry of Science and Education (MSE) of Croatia, contract no. KK.01.1.1.01.0001. We acknowledge financial support from the Austrian Research Promotion Agency (FFG) project ASAP12-85 and project SatNetQ 854022. We would like to thank Thomas Scheidl for help with the software used to run the original experiment and Mohsen Razavi & Guillermo Currás Lorenzo for their help proving the security of the implementation of the original network experiment as well as Sebastien Tanzilli and Anthony Martin for helpfull discussions.
Publisher Copyright:
© 2022 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.
PY - 2022/10/3
Y1 - 2022/10/3
N2 - The ability to know and verifiably demonstrate the origins of messages can often be as important as encrypting the message itself. Here we present an experimental demonstration of an unconditionally secure digital signature (USS) protocol implemented for the first time, to the best of our knowledge, on a fully connected quantum network without trusted nodes. We choose a USS protocol which is secure against forging, repudiation and messages are transferrable. We show the feasibility of unconditionally secure signatures using only bi-partite entangled states distributed throughout the network and experimentally evaluate the performance of the protocol in real world scenarios with varying message lengths.
AB - The ability to know and verifiably demonstrate the origins of messages can often be as important as encrypting the message itself. Here we present an experimental demonstration of an unconditionally secure digital signature (USS) protocol implemented for the first time, to the best of our knowledge, on a fully connected quantum network without trusted nodes. We choose a USS protocol which is secure against forging, repudiation and messages are transferrable. We show the feasibility of unconditionally secure signatures using only bi-partite entangled states distributed throughout the network and experimentally evaluate the performance of the protocol in real world scenarios with varying message lengths.
KW - digital signature
KW - quantum communication
KW - quantum information
KW - quantum networks
KW - unconditionally secure signature
UR - http://www.scopus.com/inward/record.url?scp=85139976446&partnerID=8YFLogxK
U2 - 10.1088/1367-2630/ac8e25
DO - 10.1088/1367-2630/ac8e25
M3 - Article
AN - SCOPUS:85139976446
SN - 1367-2630
VL - 24
JO - New Journal of Physics
JF - New Journal of Physics
IS - 9
M1 - 093038
ER -