Quantum key distribution with high loss: toward global secure communication.

By W. Hwang. Physical Review Letters, 2002

1,536 citations recorded by the source corpus.

We propose a decoy-pulse method to overcome the photon-number-splitting attack for Bennett-Brassard 1984 quantum key distribution protocol in the presence of high loss: A legitimate user intentionally and randomly replaces signal pulses by multiphoton pulses (decoy pulses). Then they check the loss of the decoy pulses. If the loss of the decoy pulses is abnormally less than that of signal pulses, the whole protocol is aborted. Otherwise, to continue the protocol, they estimate the loss of signal multiphoton pulses based on that of decoy pulses. This estimation can be done with an assumption that the two losses have similar values. We justify that assumption.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/5e0711b0251d2e711b7fb91c9c021e56b8a43102

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Artificial Intelligence

1. Hoi-Kwong Lo
2. Xiongfeng Ma
3. Lixing You
4. Jian-Wei Pan
5. Feihu Xu
6. Qiang Zhang
7. Chi-Hang Fred Fung
8. Pei Zeng

In Atomic and Molecular Physics, and Optics

1. Hoi-Kwong Lo
2. Xiongfeng Ma
3. Lixing You
4. Jian-Wei Pan
5. Feihu Xu
6. Qiang Zhang
7. Pei Zeng
8. Hongyi Zhou

Citations in the corpus

• High-dimensional quantum cryptography with twisted light (2014, background): “Finally, the average number of photons per pulse can be increased through the use of a decoy-state protocol [30].”
• Hacking commercial quantum cryptography systems by tailored bright illumination (2010, methodology): “The attack works equally well on the Scarani-Acin-Ribordy-Gisin 2004 (SARG04) 14 and decoy-state BB84 13 protocols as well as the normal BB84 protocol 4 .”
• Experimental quantum key distribution with decoy states. (2005, methodology): “The decoy method is firstly proposed by Hwang[ 13 ], and made rigorous by us[14, 15] and also”
• Practical challenges in quantum key distribution (2016, positive): “For example, the need to counter the photon-number-splitting attack 17 triggered the invention of the decoy-state protocol, 18 – 20 which allows ef fi cient distillation of secure keys using weak coherent pulse based QKD systems that once were vulnerable.”
• Fundamental limits of repeaterless quantum communications (2015, neutral): “oherent pulses. In this case, the performance of the protocol depends on an additional parameter which is the intensity of the source. In the BB84 protocol, with weak coherent pulses and decoy states [S52], Alice randomly changes the intensity µof the pulses, and reveals publicly their values during”
• Differential phase shift quantum key distribution experiment over 105 km fibre (2005, background): “protocol with Poissonian sources can be significantly extended by implementing decoy states [ 12 ]‐[16].”
• Advances in quantum cryptography (2019, neutral): “[106], it was shown to be practically useful in Ref.”
• Phase-Matching Quantum Key Distribution (2018, background): “[24] Won-Young Hwang, “Quantum key distribution with high loss: Toward global secure communication,” Phys.”
• Quantum key distribution with entangled photon sources (2007, methodology): “Decoy state method [21] has been proposed as a useful method for substantially improving the performance of the coherent state QKD.”