Experimental demonstration of Gaussian protocols for one-sided device-independent quantum key distribution

2014/05/31 by Nathan Walk, Sara Hosseini, Sara Hosseni +13 · 2 citations
Computer Science · Physics and Astronomy · #Context (archaeology) #Cryptography #Gaussian #Key (lock) #Protocol (science) #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum cryptography #Quantum entanglement #Quantum key distribution #Quantum network #Quantum nonlocality #quant-ph

paper · pdf · doi:10.1364/optica.3.000634

published as Optica Vol. 3, Issue 6, pp. 634-642, 2016 · Addition of experimental results and (several) new authors

openalex publication_date 2016/06/08 · arxiv created 2016/06/16 · arxiv updated 2016/06/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Nonlocal correlations, a longstanding foundational topic in quantum information, have recently found application as a resource for cryptographic tasks where not all devices are trusted, for example in settings with a highly secure central hub, such as a bank or government department, and less secure satellite stations which are inherently more vulnerable to hardware "hacking" attacks. The asymmetric phenomena of Einstein-Podolsky-Rosen steering plays a key role in one-sided device-independent quantum key distribution (1sDI-QKD) protocols. In the context of continuous-variable (CV) QKD schemes utilizing Gaussian states and measurements, we identify all protocols that can be 1sDI and their maximum loss tolerance. Surprisingly, this includes a protocol that uses only coherent states. We also establish a direct link between the relevant EPR steering inequality and the secret key rate, further strengthening the relationship between these asymmetric notions of nonlocality and device
\nindependence. We experimentally implement both entanglement-based and coherent-state protocols, and measure the correlations necessary for 1sDI key
\ndistribution up to an applied loss equivalent to 7.5 km and 3.5 km of optical fiber transmission respectively. We also engage in detailed modelling to understand the limits of our current experiment and the potential for further improvements. The new protocols we uncover apply the cheap and efficient hardware of CVQKD systems in a significantly more secure setting.

Citations

• High-rate measurement-device-independent quantum cryptography
• Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
• Quantum key distribution using gaussian-modulated coherent states
• Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?
• Device-Independent Security of Quantum Cryptography against Collective Attacks
• Multipartite Einstein–Podolsky–Rosen steering and genuine tripartite entanglement with optical networks
• Quantum cryptography based on Bell’s theorem
• Uncertainty Relation for Smooth Entropies
• Experimental demonstration of long-distance continuous-variable quantum key distribution
• Position-momentum uncertainty relations in the presence of quantum memory
• Realization of the Einstein-Podolsky-Rosen paradox for continuous variables in nondegenerate parametric amplification
• Steering, Entanglement, Nonlocality, and the Einstein-Podolsky-Rosen Paradox
• Cryptography from Noisy Storage
• Tight finite-key analysis for quantum cryptography

Cited by

• Einstein-Podolsky-Rosen steering and Bell nonlocality of two macroscopic mechanical oscillators in optomechanical systems
• Asymptotic security of discrete-modulation protocols for continuous-variable quantum key distribution
• Demonstration of Einstein-Podolsky-Rosen Steering Using Hybrid Continuous- and Discrete-Variable Entanglement of Light