Advances in quantum cryptography
Abstract
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 proofofprinciple lab demonstrations to infield 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 pointtopoint 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.
 Publication:

Advances in Optics and Photonics
 Pub Date:
 December 2020
 DOI:
 10.1364/AOP.361502
 arXiv:
 arXiv:1906.01645
 Bibcode:
 2020AdOP...12.1012P
 Keywords:

 Quantum Physics;
 Mathematical Physics;
 Physics  Applied Physics;
 Physics  Computational Physics;
 Physics  Optics
 EPrint:
 Review article. Comments and suggestions are welcome. REVTeX: 118 pages, 20 figures, 785 references