Symmetric Blind Information Reconciliation for Quantum Key Distribution

Kiktenko, Evgeniy O.; Трушечкин, А. С.; Lim, Charles Ci Wen; Kurochkin, Y. V.; Fedorov, Aleksey K.

doi:10.1103/physrevapplied.8.044017

Cited by 62 publications

(93 citation statements)

References 39 publications

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“…First, sifted keys from the hardware devices go through the information reconciliation stage. We use the recently suggested symmetric blind information reconciliation method [19]. It uses low-density paritycheck (LDPC) codes with frame length l frame = 4000.…”

Section: Post-processing Procedures and Application Levelmentioning

confidence: 99%

Quantum-Secured Data Transmission in Urban Fiber-Optics Communication Lines

et al. 2018

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Quantum key distribution (QKD) provides information-theoretic security in communications based on the laws of quantum physics. In this work, we report an implementation of quantumsecured data transmission in the infrastructure of Sberbank of Russia in standard communication lines in Moscow The experiment is realized on the basis of the already deployed urban fibre-optic communication channels with significant losses. We realize the decoy-state BB84 QKD protocol using the one-way scheme with polarization encoding for generating keys. Quantum-generated keys are then used for continuous key renewal in the hardware devices for establishing a quantum-secured VPN Tunnel between two offices of Sberbank. The used hybrid approach offers possibilities for longterm protection of the transmitted data, and it is promising for integrating into the already existing information security infrastructure.

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Section: Post-processing Procedures and Application Levelmentioning

confidence: 99%

Quantum-Secured Data Transmission in Urban Fiber-Optics Communication Lines

et al. 2018

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“…We note that the use of proposed approach should be promising in different ways of using LDPC codes for information reconciliation within QKD post-processing. Particularly, it seems to be useful in rate-adaptive [9,10], blind [12], and symmetricblind information reconciliation protocols [14].…”

Section: Discussionmentioning

confidence: 99%

Error Estimation at the Information Reconciliation Stage of Quantum Key Distribution

et al. 2018

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Quantum key distribution (QKD) offers a practical solution for secure communication between two distinct parties via a quantum channel and an authentic public channel. In this work, we consider different approaches to the quantum bit error rate (QBER) estimation at the information reconciliation stage of the post-processing procedure. For reconciliation schemes using LDPC codes we develop a novel syndrome-based QBER estimation algorithm. The suggested algorithm is suitable for irregular LDPC-codes, and takes into account punctured and shortened bits. With testing our approach in the real QKD setup, we show that an approach combining the proposed algorithm with conventional QBER estimation techniques allows improving accuracy of the QBER estimation.

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“…The basis for our experimental work is our recently developed modular QKD device [32,[47][48][49][50] driven by a National Instruments NI PCIe-7811R card. This setup uses a semiconductor laser LDI-DFB2.5G controlled by an FPGA board Spartan-6 to generate optical pulses at the standard telecommunication wavelength 1.55 µm and a 10 MHz repetition rate.…”

Section: Appendix D Qkd Networkmentioning

confidence: 99%

Quantum-secured blockchain

Kiktenko

Pozhar

Anufriev

et al. 2018

Quantum Sci. Technol.

217

143

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Blockchain is a distributed database which is cryptographically protected against malicious modifications. While promising for a wide range of applications, current blockchain platforms rely on digital signatures, which are vulnerable to attacks by means of quantum computers. The same, albeit to a lesser extent, applies to cryptographic hash functions that are used in preparing new blocks, so parties with access to quantum computation would have unfair advantage in procuring mining rewards. Here we propose a possible solution to the quantum-era blockchain challenge and report an experimental realization of a quantum-safe blockchain platform that utilizes quantum key distribution across an urban fiber network for information-theoretically secure authentication. These results address important questions about realizability and scalability of quantum-safe blockchains for commercial and governmental applications.

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Symmetric Blind Information Reconciliation for Quantum Key Distribution

Cited by 62 publications

References 39 publications

Quantum-Secured Data Transmission in Urban Fiber-Optics Communication Lines

Quantum-Secured Data Transmission in Urban Fiber-Optics Communication Lines

Error Estimation at the Information Reconciliation Stage of Quantum Key Distribution

Quantum-secured blockchain

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