Fast and simple one-way quantum key distribution

By D. Stucki, Nicolas Brunner, Nicolas Gisin, Valerio Scarani, H. Zbinden. 2005

337 citations recorded by the source corpus.

We present and demonstrate a new protocol for practical quantum cryptography, tailored for an implementation with weak coherent pulses to obtain a high key generation rate. The key is obtained by a simple time-of-arrival measurement on the dataline; the presence of an eavesdropper is checked by an interferometer on an additional monitoring line. The setup is experimentally simple; moreover, it is tolerant to reduced interference visibility and to photon number splitting attacks, thus featuring a high efficiency in terms of distilled secret bit per qubit.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/28d05678eb5161148b48e6ce69bccbf7b125dc3a

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In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

In Electrical and Electronic Engineering

Citations in the corpus

Advances in quantum cryptography (2019, neutral): “The first proof-of-principle implementation of the COW protocol has been reported in 2005 [229].”
High rate, long-distance quantum key distribution over 250 km of ultra low loss fibres (2009, methodology): “Firstly, we implement the coherent one way (COW) protocol, which is well tailored for QKD at high speed and over long distances [8, 15, 16 ] (see also section 2). We also used low-noise superconducting single-photon detectors.”
The security of practical quantum key distribution (2008, background): “…notably continuousvariable protocols (Cerf, Lévy and Van Assche, 2001; Gottesman and Preskill, 2001; Grosshans and Grangier, 2002a; Hillery, 2000; Ralph, 1999; Silberhorn et al., 2002) and the more recent distributed-phase-reference protocols (Inoue, Waks and Yamamoto, 2002; Stucki et al., 2005).”
Practical challenges in quantum key distribution (2016, neutral): “Single-photon detection techniques are also necessary for the so-called distributed-phase-reference protocols, such as the coherent-one-way 34 and differential-phase-shift (DPS) 35 protocols, where the key information is encoded in photon arrival times or in the phase between adjacent weak coherent…”
The Impact of Quantum Computing on Present Cryptography (2018, background): “• Coherent One Way (COW) protocol [48, 49] - the key is obtained by a time-of-arrival measurement on the data line (raw key).”
Secure quantum key distribution with realistic devices (2020, neutral): “Moreover, new protocols, such as the decoy-state (Hwang, 2003; Lo et al., 2005; Wang, 2005), differential-phase shift (DPS) (Inoue et al., 2002a), SARG-04 (Scarani et al., 2004), coherent-oneway (COW) (Stucki et al., 2005), measurement-deviceindependent (MDI) (Lo et al., 2012) [see also (Braunstein ”
Hacking commercial quantum cryptography systems by tailored bright illumination (2010, methodology): “With suitable modiﬁcations it applies to differential phase shift (DPS) 23 , and given the right set of detector parameters to coherent one-way (COW) 24 protocols.”
Chip-based quantum key distribution (2015, methodology): “The COW protocol [22] transmits pulses in pairs, encoding | 0 (cid:105) with the ﬁrst bin and | 1 (cid:105) with the second.”