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Experimental anonymous quantum conferencing
- Source :
- Optica 11, 872 (2024)
- Publication Year :
- 2023
-
Abstract
- Anonymous quantum conference key agreement (AQCKA) allows a group of users within a network to establish a shared cryptographic key without revealing their participation. Although this can be achieved using bi-partite primitives alone, it is costly in the number of network rounds required. By allowing the use of multi-partite entanglement, there is a substantial efficiency improvement. We experimentally implement the AQCKA task in a six-user quantum network using Greenberger-Horne-Zeilinger (GHZ)-state entanglement and obtain a significant resource cost reduction in line with theory when compared to a bi-partite-only approach. We also demonstrate that the protocol retains an advantage in a four-user scenario with finite key effects taken into account.
- Subjects :
- Quantum Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Optica 11, 872 (2024)
- Publication Type :
- Report
- Accession number :
- edsarx.2311.14158
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1364/OPTICA.514362