Decoy state quantum key distribution.

By Hoi-Kwong Lo, Xiongfeng Ma. Physical Review Letters, 2004

1,044 citations recorded by the source corpus.

There has been much interest in quantum key distribution. Experimentally, quantum key distribution over 150 km of commercial Telecom fibers has been successfully performed. The crucial issue in quantum key distribution is its security. Unfortunately, all recent experiments are, in principle, insecure due to real-life imperfections. Here, we propose a method that can for the first time make most of those experiments secure by using essentially the same hardware. Our method is to use decoy states to detect eavesdropping attacks. As a consequence, we have the best of both worlds--enjoying unconditional security guaranteed by the fundamental laws of physics and yet dramatically surpassing even some of the best experimental performances reported in the literature.

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

View Paper: https://www.semanticscholar.org/paper/c45f3b85a2f7efccf834de721e4183992312f859

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. Bing Qi
5. Pei Zeng
6. Hongyi Zhou
7. Jian-Wei Pan
8. Feihu Xu

In Atomic and Molecular Physics, and Optics

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

Citations in the corpus

• Quantum internet: A vision for the road ahead (2018, neutral): “In practice, single-qubit preparation can be replaced with attenuated laser pulses, using also decoy-state BB84 to guarantee security (21).”
• Differential phase shift quantum key distribution experiment over 105 km fibre (2005, result): “Equation (5) shows that the secure key generation rate scales linearly with the system transmittance α.Thischaracteristicisidenticaltothoseofthesingle-photon-basedBB84protocol [17, 18], the coherent-state-based B92 protocol with a strong reference pulse [30], the BB84 protocol with decoy state [ 13 ”
• Superconducting nanowire single-photon detectors for quantum information (2020, background): “Subsequently, many other protocols were proposed and demonstrated to make QKD more practical and powerful against various possible attacks, including decoy-state QKD [45-47], measurement device-independent QKD (MDI–QKD) [48], and the latest two-field QKD (TF–QKD) [49].”
• Secure quantum key distribution with realistic devices (2020, methodology): “With phase randomization, one can treat it as a mixture of Fock states (Lo et al., 2005).”
• Phase-Matching Quantum Key Distribution (2018, methodology): “Assuming the existence of the photon number channel model in PM-QKD, we can apply the tagging method and obtain a key-rate formula following the GLLP analysis [23,25],”
• Experimental quantum key distribution with decoy states. (2005, background): “In [ 14 ], combining the idea of security proofs using the entanglement distillation approach in”
• Compact Cavity-Enhanced Single-Photon Generation with Hexagonal Boron Nitride (2019, background): “Moreover, we compare the results with an ideal SPS and the most common conventional QKD protocols: weak coherent and decoy states[52].”
• Experimental demonstration of polarization encoding measurement-device-independent quantum key distribution. (2013, background): “In addition, phase randomization of weak coherent pulses, a crucial assumption [20] in the security proof of standard decoy state QKD [8, 9], is neglected.”