Advances in Quantum Cryptography

Stefano Pirandola, Ulrik L. Andersen, Leonardo Banchi, Mario Berta, Darius Bunandar, Roger Colbeck, Dirk Englund, Tobias Gehring, Cosmo Lupo, Carlo Ottaviani, Jason L. Pereira, Mohsen Razavi, Jesni S. Shaari, Marco Tomamichel, Vladyslav C. Usenko, Giuseppe Vallone, Paolo Villoresi, Petros Wallden

Research output: Contribution to journalArticlepeer-review


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 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.
Original languageEnglish
Pages (from-to)1012-1236
Number of pages224
JournalAdvances in Optics and Photonics
Issue number4
Early online date14 Dec 2020
Publication statusPublished - 31 Dec 2020

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