Related papers: Unconditionally secure digital signatures implemented in an 8-user quantum network

Unconditionally secure digital signatures implemented in an 8-user quantum network

URL: http://arxiv.org/abs/2202.04641v2
Date: Thu, 10 Feb 2022 08:22:56 GMT
Title: Unconditionally secure digital signatures implemented in an 8-user quantum network
Authors: Yoann Pelet, Ittoop Vergheese Puthoor, Natarajan Venkatachalam, S\"oren Wengerowsky, Martin Lon\v{c}ari\'c, Sebastian Philipp Neumann, Bo Liu, \v{Z}eljko Samec, Mario Stip\v{c}evi\'c, Rupert Ursin, Erika Andersson, John G. Rarity, Djeylan Aktas, Siddarth Koduru Joshi
Abstract summary: We present an experimental demonstration of an unconditionally secure digital signature protocol. Our USS protocol 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.
Score: 2.6625873540051033
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: 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. Our USS protocol 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.

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