Conference key agreement in a quantum network
arXiv:2207.01643 · doi:10.1038/s41534-023-00750-4
Abstract
Quantum conference key agreement (QCKA) allows multiple users to establish a secure key from a shared multi-partite entangled state. In a quantum network, this protocol can be efficiently implemented using a single copy of a N-qubit Greenberger-Horne-Zeilinger (GHZ) state to distil a secure N-user conference key bit, whereas up to N-1 entanglement pairs are consumed in the traditional pair-wise protocol. We demonstrate the advantage provided by GHZ states in a testbed consisting of a photonic six-user quantum network, where four users can distil either a GHZ state or the required number of Bell pairs for QCKA using network routing techniques. In the asymptotic limit, we report a more than two-fold enhancement of the conference key rate when comparing the two protocols. We extrapolate our data set to show that the resource advantage for the GHZ protocol persists when taking into account finite-key effects.
References in corpus (37)
- Quantum cryptography: Public key distribution and coin tossing
- Quantum secret sharing
- Fundamental Limits of Repeaterless Quantum Communications
- General Benchmarks for Quantum Repeaters
- Field test of quantum key distribution in the Tokyo QKD Network
- Multi-party entanglement in graph states
- Resource-efficient linear optical quantum computation
- A quantum network of clocks
- Non-locality and Communication Complexity
- A wavelength-tunable fiber-coupled source of narrowband entangled photons
- Longer-Baseline Telescopes Using Quantum Repeaters
- Entanglement-based wavelength multiplexed quantum communication network
- End-to-end capacities of a quantum communication network
- A trusted-node-free eight-user metropolitan quantum communication network
- Direct and Reverse Secret-Key Capacities of a Quantum Channel
- Efficient Distributed Quantum Computing
- Long-Distance Measurement-Device-Independent Multiparty Quantum Communication
- Local and Distributed Quantum Computation
- Multi-partite entanglement speeds up quantum key distribution in networks
- Distributed quantum phase estimation with entangled photons
- Quantum Conference Key Agreement: A Review
- Experimental quantum conference key agreement
- Conference key agreement with single-photon interference
- Finite-key effects in multi-partite quantum key distribution protocols
- Anonymous Quantum Conference Key Agreement
- Modular network for high-rate quantum conferencing
- Mapping graph state orbits under local complementation
- Multipartite state generation in quantum networks with optimal scaling
- Coherent one-way quantum conference key agreement based on twin field
- Secure Anonymous Conferencing in Quantum Networks
- Optimized Quantum Networks
- Anonymous and secret communication in quantum networks
- The GHZ state in secret sharing and entanglement simulation
- Limitations of nearest-neighbour quantum networks
- General upper bounds for distributing conferencing keys in arbitrary quantum networks
- Genuine multipartite entanglement is not a precondition for secure conference key agreement
- Anonymous conference key agreement in linear quantum networks
Cited by in corpus (22)
- Repeater-like asynchronous measurement-device-independent quantum conference key agreement
- Hierarchical certification of nonclassical network correlations
- Multi-field quantum conferencing overcomes the network capacity limit
- Experimental anonymous quantum conferencing
- Anonymous conference key agreement in linear quantum networks
- Experimental Measurement-Device-Independent Quantum Cryptographic Conferencing
- Experimental anonymous conference key agreement using linear cluster states
- Symmetric quantum states: a review of recent progress
- Efficient source-independent quantum conference key agreement
- Realizing a Compact, High-Fidelity, Telecom-Wavelength Source of Multipartite Entangled Photons
- Collective attack free controlled quantum key agreement without quantum memory
- Experimental Efficient Source-Independent Quantum Conference Key Agreement
- Observation of quantum nonlocality in Greenberger-Horne-Zeilinger entanglement on a silicon chip
- Photonic implementation of the quantum Morra game
- Quantum-private distributed sensing
- Emulation of satellite up-link quantum communication with entangled photons
- Guarantees on the structure of experimental quantum networks
- Genuine multipartite entanglement is not necessary for standard device-independent conference key agreement
- Multi-user QKD using quotient graph states derived from continuous-variable dual-rail cluster states
- Asynchronous Routing for Multipartite Entanglement in Quantum Networks
- Experimental Phase-Matching Quantum Cryptographic Conferencing in Symmetric and Asymmetric Fiber Channels
- Photonic quantum information with time-bins: Principles and applications