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Search · four archives
16 papers · ranked by Valyu relevance
Eleni Diamanti, Anthony Leverrier
The ability to distribute secret keys between two parties with information-theoretic security, that is regardless of the capacities of a malevolent eavesdropper, is one of the most celebrated results in the field of quantum information processing and communication. Indeed, quantum key distribution illustrates the power…
Nitin Jain, Hou-Man Chin, Hossein Mani, Cosmo Lupo + 9 more
'Dino Solar Nikolic' 'Arne Kordts' 'Stefano Pirandola' 'Thomas Brochmann Pedersen' 'Matthias Kolb' 'Bernhard Ömer' 'Christoph Pacher' 'Tobias Gehring' 'Ulrik L. Andersen'] A quantum key distribution (QKD) system must fulfill the requirement of universal composability to ensure that any cryptographic application (using…
Akshata Shenoy H., Anirban Pathak, Srikanth Radhakrishna
Cryptography is the technique of concealing confidential information using physical or mathematical means. While cryptologists find newer methods to conceal a secret, cryptanalysts devise powerful methods to compromise the same. This recursive cat-and-mouse game has pushed the field and driven progress in it…
Tobias Gehring, Vitus Händchen, Jörg Duhme, Fabian Furrer + 4 more
'Torsten Franz' 'Christoph Pacher' 'Reinhard F. Werner' 'Roman Schnabel'] Secret communication over public channels is one of the central pillars of a modern information society. Using quantum key distribution this is achieved without relying on the hardness of mathematical problems, which might be compromised by…
Takaya Matsuura, Kento Maeda, Toshihiko Sasaki, Masato Koashi
In comparison to conventional discrete-variable (DV) quantum key distribution (QKD), continuous-variable (CV) QKD with homodyne/heterodyne measurements has distinct advantages of lower-cost implementation and affinity to wavelength division multiplexing. On the other hand, its continuous nature makes it harder to…
Yichen Zhang, Yiming Bian, Zhengyu Li, Yu Song + 1 more
Quantum key distribution provides secure keys with information-theoretic security ensured by the principle of quantum mechanics. The continuous-variable version of quantum key distribution using coherent states offers the advantages of its compatibility with telecom industry, e.g., using commercial laser and homodyne…
Jennifer O Bartlett, Alfie J Myers Wilson, Christopher J Chunnilall, Rupesh Kumar
—In Local-local Oscillator (LLO) based Continuous-Variable Quantum Key Distribution (CV-QKD), the phase reference of the transmitter and receiver, Alice and Bob, are naturally de-correlated due to their use of individual lasers. A phase reference signal is used, whose measurement is critical for estimating the phase…
Li Zhang, Jiannan Huang, Jian Zhou, Rosario Lo Franco
Continuous-variable quantum key distribution has gradually shifted from optical fiber communication to space communication. In free-space quantum communication, the influence of gravity cannot be ignored. In light of the influence of gravity, this study assesses the efficacy of the thermal-state continuous-variable…
Youssef Oulouda, Mohamed El Falaki, Mohamed Daoud
In this paper we investigate the security of continuous variable BB84 quantum key distribution protocol using single photon added then subtracted squeezed coherent state (SPASSCS). It's found that the SPASSCS is a non-Gaussian and nonclassical state. Its non-Gaussianity and non-classicality are exhibited via the Wigner…
Carlo Ottaviani, Stefano Pirandola
We consider two-way continuous-variable quantum key distribution, studying its security against general eavesdropping strategies. Assuming the asymptotic limit of many signals exchanged, we prove that two-way Gaussian protocols are immune to coherent attacks. More precisely we show the general superadditivity of the…
Qiang Liu, Yinming Huang, Yongqiang Du, Zhengeng Zhao + 5 more
'Zhenrong Zhang' 'Kejin Wei' 'Pierpaolo Boffi' 'Mario Martinelli'] Quantum key distribution (QKD), guaranteed by the principles of quantum mechanics, is one of the most promising solutions for the future of secure communication. Integrated quantum photonics provides a stable, compact, and robust platform for the…
Georgi Bebrov
A great challenge in the field of quantum cryptography is the design and implementation of optimal quantum key distribution (QKD) scheme. An optimal scheme in terms of security is the so-called relativistic quantum key distribution; it ensures the security of the system by using both quantum phenomena and relativity.…
Ya-Qian Lin, Meng Wang, Xiu-Qing Yang, Hong-Wei Liu
Compared with the traditional BB84 protocol, the counterfactual quantum key distribution (QKD) does not rely on any signal travelling in the quantum channel, and therefore can present a security advantage where Eve cannot fully access signal. However, the practical system may be damaged in a scenario where the devices…
Nitin Jain
With photons being the only available candidates for long-distance quantum communication, most quantum cryptographic devices are physically realized as optical systems that operate a security protocol based on the laws of quantum mechanics. But to finally yield a stream of bits (secret key) usable for encryption, a…
Meiying Cui, Yixin Zhang
DNA has become a promising candidate as future data storage medium, which makes DNA steganography indispensable in DNA data security. While PCR primers are conventional secret keys in DNA steganography, the information can be read once the primers are intercepted. New steganography approach is needed to make the…
Authors not listed
Strong coupling and environmental memory render many open quantum systems intractable to classical computation. To overcome this barrier, we present a variational quantum algorithm capable of solving generalized form time-local quantum master equations directly on Noisy Intermediate-Scale Quantum (NISQ) processors. Our…