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Coexistence of High-Speed Physical-Layer Key Distribution and Secure Data Transmission in Fiber

Xinran Huang, Xinyong Peng, Liuming Zhang +4 more

Physical-layer secure key distribution (PLSKD) exploiting channel reciprocity and randomness is promising for data security enhancement in fiber, offering an endogenous high key generation rate (KGR) up to Gb/s. The PLSKD provides the integration possibility of key generation and data transmission within the same fiber channel. The coexistence schemes of PLSKD and secure data transmission in fibers are proposed using wavelength division multiplexing (WDM), and full-duplex transmission at the same wavelength. The coexistence schemes are experimentally demonstrated with a 3.4 and 3.25 Gb/s PLSKD, where the encrypted data rate is 15.7 Gb/s, over a 20 km standard single-mode fiber (SSMF) using WDM or full-duplex respectively. The effects of channel spacing using WDM and trade-offs between PLSKD and secure data transmission using full-duplex are fully analyzed. The proposed secure data transmission with PLSKD is classical and fully compatible with current fiber infrastructures.Physical-layer secure key distribution (PLSKD) exploiting channel reciprocity and randomness is promising for data security enhancement in fiber, offering an endogenous high key generation rate (KGR) up to Gb/s. The PLSKD provides the integration possibility of key generation and data transmission within the same fiber channel. The coexistence schemes of PLSKD and secure data transmission in fibers are proposed using wavelength division multiplexing (WDM), and full-duplex transmission at the same wavelength. The coexistence schemes are experimentally demonstrated with a 3.4 and 3.25 Gb/s PLSKD, where the encrypted data rate is 15.7 Gb/s, over a 20 km standard single-mode fiber (SSMF) using WDM or full-duplex respectively. The effects of channel spacing using WDM and trade-offs between PLSKD and secure data transmission using full-duplex are fully analyzed. The proposed secure data transmission with PLSKD is classical and fully compatible with current fiber infrastructures.

Journal of Lightwave TechnologySep 18, 202310 citations

Quantum cryptography for WDM networks: encryption with coherent states and key generation with fiber based entanglement

Chuang Liang

Jan 1, 20071 citation

Quantum key distribution over WDMs and optical switches to combine the quantum channel with synchronization channels

Andreas Poppe, Hannes Hübel, Fotini Karinou +6 more

European Conference on Optical CommunicationJan 1, 20074 citations

Digital Coherent PSK Y-00 Quantum Stream Cipher for Secure and High-Capacity Optical Transmission Systems

Ken Tanizawa, Fumio Futami

A symmetric-key direct data encryption system based on secrecy realized by quantum-noise masking is introduced. 10–48 Gbit/s cipher systems compatible with current WDM systems are achieved without significant negative impact on transmission performances.

Asia Communications and Photonics ConferenceNov 2, 20190 citations

Experimental demonstration of the coexistence of continuous-variable quantum key distribution with an intense DWDM classical channel

Paul Jouguet, Sébastien Kunz-Jacques, Rupesh Kumar +4 more

Aug 1, 20131 citation

High-Speed Quantum Key Distribution System for 1-Mbps Real-Time Key Generation

Akihiro Tanaka, Mikio Fujiwara, K. Yoshino +8 more

A high-speed quantum key distribution (QKD) system has been developed with the goal of a 1-Mbps final secure key generation rate under 10-dB transmission loss, which corresponds to 50 km of standard single mode fiber. For the purpose of speeding-up all processes in QKD sequence, we apply a wavelength-division-multiplexing (WDM) technique using the colorless interferometric technique and a key distillation hardware (HW) engine. We establish a novel WDM scheme, sharing interferometers and their temperature regulators over multiple channels, which enables us to increase the number of channels with a small impact on system cost and size. To generate a secure key while satisfying both high speed and high security, we develop a key distillation HW engine which enables us to execute key distillation with 1-Mbit code length in real time. We have experimentally evaluated the performance of the developed system through installed fiber. By operating three wavelength channels, a new, world leading key generation rate of greater than 200 kbps over a 14.5-dB transmission loss has been achieved.A high-speed quantum key distribution (QKD) system has been developed with the goal of a 1-Mbps final secure key generation rate under 10-dB transmission loss, which corresponds to 50 km of standard single mode fiber. For the purpose of speeding-up all processes in QKD sequence, we apply a wavelength-division-multiplexing (WDM) technique using the colorless interferometric technique and a key distillation hardware (HW) engine. We establish a novel WDM scheme, sharing interferometers and their temperature regulators over multiple channels, which enables us to increase the number of channels with a small impact on system cost and size. To generate a secure key while satisfying both high speed and high security, we develop a key distillation HW engine which enables us to execute key distillation with 1-Mbit code length in real time. We have experimentally evaluated the performance of the developed system through installed fiber. By operating three wavelength channels, a new, world leading key generation rate of greater than 200 kbps over a 14.5-dB transmission loss has been achieved.

IEEE Journal of Quantum ElectronicsFeb 10, 2012101 citations

Coexistence of PSK quantum key distribution and WDM channels in optical transmission systems

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Coexistence of PSK quantum key distribution and WDM channels in optical transmission systems

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