Long-Distance Device-Independent Conference Key Agreement
arXiv:2506.01296 · doi:10.1103/2qyl-3rk1
Abstract
Device-independent quantum key distribution (DI-QKD) enables two remote parties to share an information-theoretically secure key without any assumptions on the inner workings of the devices used. Device-independent conference key agreement (DI-CKA) is multipartite DI-QKD where more than two parties share a common secure key. The performance of DI-CKA, however, is strictly limited because of its susceptibility to losses due e.g. to imperfect detection efficiency and channel transmission. Here, we propose a DI-CKA protocol which reduces this limitation by using a heralding scheme to distribute multipartite entanglement. We analyze key rates of our protocol for two different measurement scenarios and we show that our protocol outperforms a previous DI-CKA protocol even with an experimentally feasible measurement.
10 pages, 7 figures
References in corpus (29)
- Quantum cryptography: Public key distribution and coin tossing
- Advances in Quantum Cryptography
- Device-independent security of quantum cryptography against collective attacks
- Secure quantum key distribution with realistic devices
- A convergent hierarchy of semidefinite programs characterizing the set of quantum correlations
- Device-independent quantum key distribution secure against collective attacks
- Secure device-independent quantum key distribution with causally independent measurement devices
- Experimental device-independent quantum key distribution between distant users
- Proposal for Implementing Device-Independent Quantum Key Distribution based on a Heralded Qubit Amplification
- Detecting Infrared Single Photons with Near-Unity System Detection Efficiency
- Advances in device-independent quantum key distribution
- More Randomness from the Same Data
- Photonic verification of device-independent quantum key distribution against collective attacks
- Using complete measurement statistics for optimal device-independent randomness evaluation
- Fully device independent Conference Key Agreement
- Algorithm 950: Ncpol2sdpa---Sparse Semidefinite Programming Relaxations for Polynomial Optimization Problems of Noncommuting Variables
- Advantage distillation for device-independent quantum key distribution
- Device-independent quantum key distribution with single-photon sources
- Noisy pre-processing facilitating a photonic realisation of device-independent quantum key distribution
- Security of device-independent quantum key distribution protocols: a review
- Device-independent quantum key distribution with random postselection
- Implementation of projective measurements with linear optics and continuous photon counting
- Binary projective measurement via linear optics and photon counting
- A Genuine Multipartite Bell Inequality for Device-independent Conference Key Agreement
- Device-independent lower bounds on the conditional von Neumann entropy
- Detecting mode entanglement: The role of coherent states, superselection rules and particle statistics
- Boosting device-independent cryptography with tripartite nonlocality
- Comment on "Fully device-independent conference key agreement" [Phys. Rev. A 97, 022307 (2018)]
- Simple loss-tolerant protocol for GHZ-state distribution in a quantum network