Hybrid linear amplifier-involved detection for continuous variable quantum key distribution with thermal states*

He, Yuxin; Mao, Yun; Zhong, Hai; Huang, Duang; Guo, Ying

doi:10.1088/1674-1056/ab8216

Cited by 11 publications

(6 citation statements)

References 50 publications

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“…Because optical quantum repeaters are expected to become commercially accessible soon, QKD networks are now developed entirely using the Trusted Repeater Approach (TRA) [26]. Numerical simulations demonstrated that inserting HLA (hybrid linear amplifier) before Bob's detector can improve TS-CVQKD (thermal-state continuous-variable quantum key distribution) protection in the near-and mid-infrared or terahertz regions [27].…”

Section: Literature Reviewmentioning

confidence: 99%

Qubit and bit-based quantum hybrid secret key generation

Sihare¹

2022

Eur. Phys. J. D

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For the generation of a secret key, hardly a quantum algorithms integrating states and bits have yet developed. Integrating random states and bits is difficult for a combiner component. The underlying problems of the study are the design of a quantum circuit, an algorithm, state polarization setup, and the concatenation of bits and states. By combining either rectilinear, orthogonal (superposition), or both states with bits, we have investigated three different possibilities for the quantum hybrid protocol. We investigated errors in each case and compared them with regard to decoherence and other quantum mechanics properties by taking into consideration the effectiveness of states during transmission time across an untrusted channel. Furthermore, we observed that key size, state errors, design complexity, and security are all addressed in a reasonable manner for identifying solutions while comparing our results to earlier proposed quantum protocols. Because of this, the suggested key protocol's effectiveness is greater than that of earlier proposed protocols.

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Section: Literature Reviewmentioning

confidence: 99%

Qubit and bit-based quantum hybrid secret key generation

Sihare¹

2022

Eur. Phys. J. D

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“…They endow quantum computing with absolute security. With this advantage, a huge number of quantum cryptography protocols have been proposed to solve cryptography challenges, embracing quantum secure direct communication (QSDC), [5][6][7][8] quantum secret sharing (QSS), [9][10][11][12] and quantum key distribution (QKD), [13][14][15][16][17] as well as quantum secure multiparty computation (QSMPC), [18][19][20][21][22][23][24] etc.…”

Section: Introductionmentioning

confidence: 99%

Efficient quantum private comparison protocol utilizing single photons and rotational encryption

et al. 2022

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As a branch of quantum secure multi-party computation, quantum private comparison is applied frequently in many fields, such as secret elections, private voting, and identification. A quantum private comparison protocol with higher efficiency and easier implementation is proposed in this paper. The private secrets are encoded as single polarized photons and then encrypted with a homomorphic rotational encryption method. Relying on this method and the circular transmission mode, we implement the multiplexing of photons, raising the efficiency of our protocol to 100%. Our protocol is easy to realize since only single photons, unitary operation, and single-particle measurement are introduced. Meanwhile, the analysis shows that our protocol is also correct and secure.

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“…This makes the application of short-range quantum cryptography possible, and the study of thermal-state CV-QKD becomes very important. In recent literature, the theoretical and experimental security of different detection and reconciliation modes of thermal-state CV-QKD has been proved [19], [31]- [35].…”

Section: Introductionmentioning

confidence: 99%

Practical Measurement Angular Errors Analysis for Thermal-State Continuous-Variable Quantum Key Distribution

Ren

Huang

et al. 2022

IEEE Photonics J.

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Thermal-state continuous-variable quantum key distribution (CV-QKD) of direct reconciliation with heterodyne detection can improve the robustness of the protocols. However, CV-QKD protocols require outlier detection, optical phase shifters are used to achieve orthogonal differentiation of the modes, but the actual optical phase shifters suffer from measurement angular errors, resulting in the imperfect phase. This kind of error degrades the security of the system. In this paper, we analyze the causes of measurement angular error and its impact on the secret key rate of the thermal-state CV-QKD protocols. We propose a compensation method to compensate for the effects of the measurement angular error and give a more complete secure analysis method under collective attack. The results obtained in this paper further improve the secure analysis under the thermalstate protocol and further enhance the performance of the system using the compensation method.

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Hybrid linear amplifier-involved detection for continuous variable quantum key distribution with thermal states*

Cited by 11 publications

References 50 publications

Qubit and bit-based quantum hybrid secret key generation

Qubit and bit-based quantum hybrid secret key generation

Efficient quantum private comparison protocol utilizing single photons and rotational encryption

Practical Measurement Angular Errors Analysis for Thermal-State Continuous-Variable Quantum Key Distribution

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