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Advances in Quantum Cryptography
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Quantum cryptography is arguably the fastest growing area in quantum information science. Novel theoretical protocols are designed on a regular basis, security proofs are constantly improving, and experiments are gradually moving from proof-of-principle lab demonstrations to in-field implementations and technological prototypes. In this review, we provide both a general introduction and a state of the art description of the recent advances in the field, both theoretically and experimentally. We start by reviewing protocols of quantum key distribution based on discrete variable systems. Next we consider aspects of device independence, satellite challenges, and high rate protocols based on continuous variable systems. We will then discuss the ultimate limits of point-to-point private communications and how quantum repeaters and networks may overcome these restrictions. Finally, we will discuss some aspects of quantum cryptography beyond standard quantum key distribution, including quantum data locking and quantum digital signatures.
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Cited by 11 Pith papers
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Experimental demonstration of memory-enhanced quantum communication
A single silicon-vacancy spin in a diamond nanocavity performs asynchronous Bell-state measurements, more than quadrupling the secret key rate of measurement-device-independent quantum key distribution over direct tra...
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Computing secure key rates for quantum key distribution with untrusted devices
This paper derives an SDP-based lower bound on the von Neumann entropy for device-independent QKD, enabling key-rate computations for arbitrary protocols via the NPA hierarchy.
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Experimental Semi-quantum Key Distribution With Classical Users
A QKD protocol lets two fully classical users establish a secure key using only detection or reflection of a single photon supplied by an untrusted quantum server, with a finite-key security proof and a proof-of-princ...
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From the Hong-Ou-Mandel Effect to Quantum Sensing: Interference of Nonclassical Light with Partial Distinguishability and Noise
New Fock-state suppression laws, a partial-distinguishability extension of Gaussian Boson Sampling via overlap matrices, and a proof that measurement incompatibility survives even when probe incompatibility vanishes f...
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Faithful and secure distributed quantum sensing under general-coherent attacks
Distributed quantum phase-estimation protocols with safety thresholds are claimed secure against general-coherent attacks using a LOCC de Finetti theorem, with a proof-of-principle photonic demonstration.
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Teleportation-based collective attacks in Gaussian quantum key distribution
An all-optical teleportation attack can perform collective eavesdropping in Gaussian QKD without channel purification, reaching optimality only with infinite entanglement and beating individual attacks with finite resources.
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Continuous-Variable Quantum Key Distribution with Rateless Reconciliation Protocol
A rateless reconciliation protocol combining multidimensional reconciliation with Raptor codes achieves over 95% efficiency from -20 to 0 dB SNR in simulations and supports optimal modulation variance in CV-QKD.
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Generalized security analysis framework for continuous-variable quantum key distribution
A generalized security analysis framework for CV QKD constructs an equivalent mixed two-mode state from measured quadrature variances and correlations, purified via Bloch-Messiah decomposition, removing symmetrization...
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Exploring the limitations of quantum networking through butterfly-based networks
In butterfly-based networks, achievable classical multicast rates exceed upper bounds on quantum multicast rates, with the gap growing up to one bit per receiver when blocks are added in parallel.
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One-Time Shot-Noise Unit Calibration Method for Continuous-Variable Quantum Key Distribution
A one-time shot-noise calibration that normalizes by total homodyne noise is shown to match a trusted-detector entanglement-based model and to achieve key rates comparable to the two-step method.
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The Quantum Internet (Technical Version)
The paper presents a broad vision of a future global quantum internet, with original conceptual proposals like QTCP and quantum sneakernet, while explicitly acknowledging that much of its content is review.
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