Advances in quantum cryptography

Stefano Pirandola

doi:10.1364/AOP.361502

Advances in quantum cryptography

2020-12-14

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DOI：10.1364/AOP.361502

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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 paper, we provide both a general introduction and a state-of-the-an description of the recent advances in the field, both theoretical and experimental. We start by reviewing protocols of quantum key distribution based on discrete variable systems. Next we consider aspects of device independence, satellite challenges, and 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 random number generators and quantum digital signatures. (C) 2020 Optical Society of America

Keywords:

ORBITAL-ANGULAR-MOMENTUM

POLYNOMIAL-TIME ALGORITHMS

ERROR-CORRECTING CODES

OF-THE-ART

KEY DISTRIBUTION

UNCONDITIONAL SECURITY

CONTINUOUS-VARIABLES

ENTANGLEMENT DISTRIBUTION

PRIVACY AMPLIFICATION

ENTROPIC UNCERTAINTY

Advances in quantum cryptography

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