Quantum key distribution and 1 Gbps data encryption over a single fibre

2009/12/09 by Patrick Eraerds, Nino Walenta, Matthieu Legre +4 · 7 citations
Computer Science · Physics and Astronomy · #Channel (broadcasting) #Computer network #Computer science #Encryption #Multiplexing #Optics #Optoelectronics #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum channel #Quantum cryptography #Quantum entanglement #Quantum information #Quantum key distribution #Quantum mechanics #Quantum optics and atomic interactions #Telecommunications #Wavelength #Wavelength-division multiplexing #quant-ph

paper · pdf · doi:10.1088/1367-2630/12/6/063027

9 pages, 7 figures

arxiv created 2009/12/09 · openalex publication_date 2010/06/15 · arxiv updated 2015/05/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We perform quantum key distribution (QKD) over a single fibre in the presence of four classical channels in a C-band dense wavelength division multiplexing (DWDM) configuration using a commercial QKD system. The classical channels are used for key distillation and 1 Gbps encrypted communication, rendering the entire system independent of any other communication channel than a single dedicated fibre. We successfully distil secret keys over fibre spans of up to 50 km. The separation between the quantum channel at 1551.72 nm and the nearest classical channel is only 200 GHz, while the classical channels are all separated by 100 GHz. In addition to that, we discuss possible improvements and alternative configurations, e.g. whether it is advantageous to choose the quantum channel at 1310 nm or to opt for a pure C-band (1530–1565 nm) configuration.

Citations

• New hash functions and their use in authentication and set equality
• Quantum cryptography: Public key distribution and coin tossing
• Security of two quantum cryptography protocols using the same four qubit states
• Quantum Cryptography Protocols Robust against Photon Number Splitting Attacks for Weak Laser Pulse Implementations

Cited by

• Quantum estimation of the Schwarzschild spacetime parameters of the Earth
• Opportunistic QKD: Exploiting Idle Capacity of Classical WDM Systems
• Coexistence of High-Bit-Rate Quantum Key Distribution and Data on Optical Fiber
• Coexistence of continuous variable QKD with intense DWDM classical channels
• Feasibility of quantum key distribution through a dense wavelength division multiplexing network
• Concise security bounds for practical decoy-state quantum key distribution
• Secure quantum key distribution with realistic devices

Related

• Quantum key distribution over 122 km of standard telecom fiber
• Refrence-Frame-Independent Quantum Key Distribution over 250 km of Optical Fiber
• Quantum key distribution over 40 dB channel loss using superconducting single photon detectors
• Microwave Photonics Parallel Quantum Key Distribution
• Unconditionally secure quantum key distribution over 50 km of standard telecom fibre