Naslov
Unconditionally secure digital signatures implemented in an eight-user quantum network

Autori
Pelet, Yoann ; Puthoor, Ittoop Vergheese ; Venkatachalam, Natarajan ; Wengerowsky, Sören ; Lončarić, Martin ; Neumann, Sebastian Philipp ; Liu, Bo ; Samec, Željko ; Stipčević, Mario ; Ursin, Rupert ; Andersson, Erika ; Rarity, John G ; Aktas, Djeylan ; Joshi, Siddarth Koduru

Izvornik
New journal of physics (1367-2630) 24 (2022), 9; 1-11

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
quantum networks ; unconditionally secure signature ; digital signature ; quantum communication ; quantum information

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA