Gigahertz decoy quantum key distribution with 1 Mbit/s secure key rate.

  title={Gigahertz decoy quantum key distribution with 1 Mbit/s secure key rate.},
  author={Alexander R. Dixon and Z. L. Yuan and James F. Dynes and A. W. Sharpe and Andrew J. Shields},
  journal={Optics express},
  volume={16 23},
We report the first gigahertz clocked decoy-protocol quantum key distribution (QKD). Record key rates have been achieved thanks to the use of self-differencing InGaAs avalanche photodiodes designed specifically for high speed single photon detection. The system is characterized with a secure key rate of 1.02 Mbit/s for a fiber distance of 20 km and 10.1 kbit/s for 100 km. As the present advance relies upon compact non-cryogenic detectors, it opens the door towards practical and low cost QKD… 

Figures and Tables from this paper

Decoy-state quantum key distribution with polarized photons over 200 km.

A novel and economic way of synchronization method is designed and incorporated into the system, which allows to work at a low frequency of 40kHz and removes the use of highly precise clock.

Practical long-distance quantum key distribution system using decoy levels

Quantum key distribution (QKD) has the potential for widespread real-world applications, but no secure long-distance experiment has demonstrated the truly practical operation needed to move QKD from

Security of decoy-state quantum key distribution with imperfect phase randomization

This work provides a security proof for decoy-state QKD with correlated phases that provides key rates close to the ideal scenario and paves the way towards high-performance QkD with practical laser sources.

High-rate quantum key distribution over 100 km using ultra-low-noise, 2-GHz sinusoidally gated InGaAs/InP avalanche photodiodes.

The differential phase shift QKD (DPS-QKD) protocol is implemented with electrically cooled and 2-GHz sinusoidally gated APDs and the distance that secure keys against the general individual attacks can be distributed has been extended to 160 km.

Megabits secure key rate quantum key distribution

  • Q. ZhangH. Takesue Y. Yamamoto
  • Computer Science, Physics
    2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics and Laser Science Conference
  • 2009
This work implemented the differential phase shift (DPS) quantum key distribution (QKD) with an up-conversion-assisted hybrid photon detector (HPD) and achieved a 1.3 Mbits per second secure key rate over a 10 km fiber, which is tolerant against photon number splitting (PNS) attack, general collective attacks on individual photons and any other known sequential unambiguous state discrimination attacks.

High speed prototype quantum key distribution system and long term field trial.

A record high bit rate prototype QKD system providing a total of 878 Gbit of secure key data over a 34 day period corresponding to a sustained key rate of around 300 kbit/s is reported.

Single photon detection for high bit rate quantum communication

Quantum communication, in particular, quantum key distribution (QKD) is moving ever closer to real world implementation. However, for successful QKD system deployment, the QKD system components must

Long distance measurement-device-independent quantum key distribution with entangled photon sources

We present a feasible method that can make quantum key distribution (QKD), both ultra-long-distance and immune, to all attacks in the detection system. This method is called

Security of Decoy-State Quantum Key Distribution with Correlated Intensity Fluctuations

This work improves this security proof technique by combining it with a tight estimation of the relevant parameters that determine the secret key rate, and provides a key rate very similar to the ideal scenario, which highlights the importance of an accurate experimental characterization of the correlations.

Analysis of detector performance in a gigahertz clock rate quantum key distribution system

We present a detailed analysis of a gigahertz clock rate environmentally robust phase-encoded quantum key distribution (QKD) system utilizing several different single-photon detectors, including the



Long-distance decoy-state quantum key distribution in optical fiber.

Using ultralow-noise, high-efficiency transition-edge sensor photodetectors, this work has implemented the first version of a decoy-state protocol that incorporates finite statistics without the use of Gaussian approximations in a one-way QKD system, enabling the creation of secure keys immune to photon-number-splitting attacks and highly resistant to Trojan horse attacks.

Gigahertz quantum key distribution with InGaAs avalanche photodiodes

We report a demonstration of quantum key distribution (QKD) at gigahertz clock rates with InGaAs avalanche photodiodes (APDs) operating in a self-differencing mode. Such a mode of operation allows

Experimental long-distance decoy-state quantum key distribution based on polarization encoding.

The decoy-state quantum key distribution (QKD) with one-way quantum communication in polarization space over 102 km is demonstrated and can really offer the unconditionally secure final keys.

Erratum: “Unconditionally secure one-way quantum key distribution using decoy pulses” [Appl. Phys. Lett. 90, 011118 (2007)]

We report here a complete experimental realization of one-way decoy-pulse quantum key distribution, demonstrating an unconditionally secure key rate of 5.51 kbps for a 25.3 km fibre length. This is


  • S. Ali
  • Physics, Computer Science
  • 2010
An unconditionally secure key rate of 6.2931 x 10 -4 per pulse for a 25 km fiber length is demonstrated, which is much better performance than QKD system without decoy state in terms of key generation rate and distance.

Quantum key distribution over a 40-dB channel loss using superconducting single-photon detectors

The keys generated in the first quantum key distribution experiment to enable the creation of secure keys over 42 dB channel loss and 200 km of optical fibre are secure against both general collective attacks on individual photons and a specific collective attack on multiphotons.

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

  • W. Hwang
  • Computer Science, Physics
    Physical review letters
  • 2003
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 by intentionally and randomly replacing signal pulses by multiphoton pulses (decoy pulses).

Quantum key distribution over 122 km of standard telecom fiber

We report a demonstration of quantum key distribution over a standard telecom fiber exceeding 100 km in length. Through careful optimization of the interferometer and single photon detector, we

Fast and simple one-way quantum key distribution

A new protocol for practical quantum cryptography, tailored for an implementation with weak coherent pulses to obtain a high key generation rate, featuring a high efficiency in terms of distilled secret bit per qubit.

Continuous operation of a one-way quantum key distribution system over installed telecom fibre.

A robust, compact and automated quantum key distribution system, based upon a one-way Mach-Zender interferometer, which is actively compensated for temporal drifts in the photon phase and polarization is demonstrated, suggesting that actively compensated QKD systems are suitable for practical applications.