Quantum Key Distribution Protocols: A Review

Singh, Hitesh; Gupta, Deepak; Singh, Aman

doi:10.9790/0661-162110109

Cited by 38 publications

(31 citation statements)

References 16 publications

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“…We also stress that although there are reported benefits with HD encoding, not all commonly used protocols have been generalized to high dimensions, for example, the SARG04 protocol [63] which is designed for robustness against the photon number splitting attacks or the B92 protocol which is a simpler version of the BB84 protocol [64], hence newer protocols such as the Round-Robin Differential-Phase-Shift are the subject of ongoing development in the context of spatial modes [65]. Importantly, there may be further improvements of our work by implementing our selection of modes with decoy states which has proven invaluable for HD QKD in both free-space and fiber [66,67] and could be of higher value if implemented with heralded sources [57].…”

Section: Discussionmentioning

confidence: 99%

Self-healing high-dimensional quantum key distribution using hybrid spin-orbit Bessel states

et al. 2018

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Using spatial modes for quantum key distribution (QKD) has become highly topical due to their infinite dimensionality, promising high information capacity per photon. However, spatial distortions reduce the feasible secret key rates and compromise the security of a quantum channel. In an extreme form such a distortion might be a physical obstacle, impeding line-ofsight for free-space channels. Here, by controlling the radial degree of freedom of a photon's spatial mode, we are able to demonstrate hybrid high-dimensional QKD through obstacles with self-reconstructing single photons. We construct high-dimensional mutually unbiased bases using spin-orbit hybrid states that are radially modulated with a non-diffracting Bessel-Gaussian (BG) profile, and show secure transmission through partially obstructed quantum links. Using a prepare-measure protocol we report higher quantum state self-reconstruction and information retention for the non-diffracting BG modes as compared to Laguerre-Gaussian modes, obtaining a quantum bit error rate (QBER) that is up to 3× lower. This work highlights the importance of controlling the radial mode of single photons in quantum information processing and communication as well as the advantages of QKD with hybrid states.

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Section: Discussionmentioning

confidence: 99%

Self-healing high-dimensional quantum key distribution using hybrid spin-orbit Bessel states

et al. 2018

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“…This makes it difficult for an attacker to eavesdrop on a communication channel without leaving any trace. In case of eavesdropping the legitimate exchange parties are able to discard the corrupted information as well as to calculate the amount of information that has been intercepted [27]. This property was exploited in BB84.…”

Section: A Quantum Key Distributionmentioning

confidence: 99%

The Impact of Quantum Computing on Present Cryptography

Mavroeidis¹,

Vishi²,

Zych³

et al. 2018

ijacsa

187

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The aim of this paper is to elucidate the implications of quantum computing in present cryptography and to introduce the reader to basic post-quantum algorithms. In particular the reader can delve into the following subjects: present cryptographic schemes (symmetric and asymmetric), differences between quantum and classical computing, challenges in quantum computing, quantum algorithms (Shor's and Grover's), public key encryption schemes affected, symmetric schemes affected, the impact on hash functions, and post quantum cryptography. Specifically, the section of Post-Quantum Cryptography deals with different quantum key distribution methods and mathematicalbased solutions, such as the BB84 protocol, lattice-based cryptography, multivariate-based cryptography, hash-based signatures and code-based cryptography.

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“…It de Steps of the BB84 protocol [7]to exchange the secret key has been described here. Alice and Bob both perform these steps as below:…”

Section: Quantum Crymentioning

confidence: 99%