Finite-key security against coherent attacks in quantum key distribution

Abstract

The work by Christandl, König and Renner [Phys. Rev. Lett. 102, 020504 (2009)] provides in particular the possibility of studying unconditional security in the finite-key regime for all discrete-variable protocols. We spell out this bound from their general formalism. Then we apply it to the study of a recently proposed protocol [Laing et al., Phys. Rev. A 82, 012304 (2010)]. This protocol is meaningful when the alignment of Alice's and Bob's reference frames is not monitored and may vary with time. In this scenario, the notion of asymptotic key rate has hardly any operational meaning, because if one waits too long time, the average correlations are smeared out and no security can be inferred. Therefore, finite-key analysis is necessary to find the maximal achievable secret key rate and the corresponding optimal number of signals.

9 pages, 4 figures

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• Continuous-variable quantum key distribution protocols with a non-Gaussian modulation
• A largely self-contained and complete security proof for quantum key distribution
• Reference frame independent quantum key distribution server with telecom tether for on-chip client
• Conference key agreement with single-photon interference
• Finite-key effects in multi-partite quantum key distribution protocols
• Proof-of-principle experiment of reference-frame-independent quantum key distribution with phase coding
• Demonstration of Free-space Reference Frame Independent Quantum Key Distribution
• Reference-Frame-Independent Quantum Key Distribution Using Fewer States
• Efficient decoy-states for the reference-frame-independent measurement-device-independent quantum key distribution
• Postselection technique for optical Quantum Key Distribution with improved de Finetti reductions
• Experimental comparison of various quantum key distribution protocols under reference frame rotation and fuctuation
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• QKD with finite resources: secret key rates via Rényi entropies
• Tight finite-key analysis for generalized high-dimensional quantum key distribution
• Twin-field quantum key distribution with partial phase postselection
• Experimental demonstration of improved reference-frame-independent quantum key distribution over 175km
• Secret key rates for coherent attacks
• Device independent security of quantum key distribution from monogamy-of-entanglement games
• Multipartite Entanglement Detection via Correlation Minor Norm
• Secure Composition of Quantum Key Distribution and Symmetric Key Encryption
• Quantum communications in continuous variable systems
• Towards Fully Passive Time-Bin Quantum Key Distribution over Moving Free-Space Channels
• Imperfect detectors for adversarial tasks with applications to quantum key distribution
• Quantum Key Distribution with Imperfections: Recent Advances in Security Proofs
• Explicit attacks on differential phase shift quantum key distribution