Fully Passive Quantum Key Distribution

Wang, Wenyuan; Wang, Rong; Cheng-qiu, HU; Zapatero, Víctor; Qian, Li; Qi, Bing; Curty, Marcos; Lo, Hoi-Kwong

doi:10.1103/physrevlett.130.220801

Cited by 23 publications

(6 citation statements)

References 47 publications

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“…Attackers intercept and maliciously resend the communication to the targeted recipient [27]. To thwart this assault, the proposed scheme uses QKD and secrecy.…”

Section: Stability Assessmentmentioning

confidence: 99%

Q-ECS: Quantum-Enhanced Cloud Security with Attribute-based Cryptography and Quantum Key Distribution

Nauman,

Zhang,

et al. 2024

Preprint

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In the contemporary landscape of advanced technological ecosystems, the ubiquity of cloud computing serves as a cornerstone for orchestrating and maintaining a myriad of global datasets, information repositories, and service infrastructures. This widespread adoption of cloud computing, however, has brought forth a pressing need to confront and mitigate security challenges, necessitating the formulation of resilient protocols to safeguard the sanctity and confidentiality of data. In response to this imperative, our research endeavors to propose an innovative and secure paradigm for cloud data access, harnessing the synergies of attribute-based cryptography (ABC) and quantum key distribution (QKD). This methodology capitalizes on the intrinsic security of quantum channels to facilitate the secure transmission of cryptographic keys across nodes. We validate the effectiveness of our model through extensive simulations. This comparison, which is based on state-of-the-art methods, looks at a wide range of performance metrics, such as the time it takes to create a key, the time it takes to decrypt and encrypt, and other important factors. Compared to state-of-the-art algorithms, our proposed algorithm performs better with better encoding times (2.6s to 5.2s) and decryption timings (1.2s to 3.6s). While QKD-ABC regularly obtains the shortest analysis times (29.1s to 149.1s), it is clear that QKD-ABC is the best method for safe cloud data access. The particular numerical metrics demonstrate the unmatched performance of QKD-ABC in a variety of activities.

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“…Attackers intercept and maliciously resend the communication to the targeted recipient [27]. To thwart this assault, the proposed scheme uses QKD and secrecy.…”

Section: Stability Assessmentmentioning

confidence: 99%

Q-ECS: Quantum-Enhanced Cloud Security with Attribute-based Cryptography and Quantum Key Distribution

Nauman,

Zhang,

et al. 2024

Preprint

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“…In Ref. [33], dedicated to the fully-passive QKD, the authors consider an equivalent virtual entanglement-based protocol with a source that emits perfectly encoded pure decoy states in the X, Y-bases and signal states with mixed polarizations in the Z-basis. It is shown that Alice's imperfect preparation in the Z-basis is equivalent to the imperfect measurement (i.e., the trusted noise in Alice's post-processing) and does not affect the amount of privacy amplification.…”

Section: Vmentioning

confidence: 99%

“…Nevertheless, we can use one of the ideas of Refs. [33,38]-the replacement of the source of randomly fluctuating pure states {|ψ i } by an equivalent source emitting the mixed states {ρ i },…”

Section: Vmentioning

confidence: 99%

“…We extend this research and also investigate the imperfect encoding state preparation. Using the idea of fully-passive source [33], we compute the averaged density matrices and apply the imbalanced quantum coin approach [7] to estimate the phase error rate. In particular, it is demonstrated that for our setup the encoding inaccuracies can lead to the key rate reduction not exceeding 50% for channel losses up to 20 dB (equivalent to transmission distances up to 100 km), and the critical transmission distance can reach ∼120 km.…”

Section: Introductionmentioning

confidence: 99%

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Security of the Decoy-State BB84 Protocol with Imperfect State Preparation

Reutov,

Tayduganov,

Mayboroda

et al. 2023

Entropy

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The quantum key distribution (QKD) allows two remote users to share a common information-theoretic secure secret key. In order to guarantee the security of a practical QKD implementation, the physical system has to be fully characterized and all deviations from the ideal protocol due to various imperfections of realistic devices have to be taken into account in the security proof. In this work, we study the security of the efficient decoy-state BB84 QKD protocol in the presence of the source flaws, caused by imperfect intensity and polarization modulation. We investigate the non-Poissonian photon-number statistics due to coherent-state intensity fluctuations and the basis-dependence of the source due to non-ideal polarization state preparation. The analysis is supported by the experimental characterization of intensity and phase distributions.

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“…There have also been many outstanding works on QKD chips in recent years. For example, the implementation of measurementdevice-independent QKD networking scheme with robustness against environmental disturbance and adaptability to multiuser access, [31] ultra-long-distance fiber-based QKD system, [32] high-speed integrated QKD system, [33] and entirely passive linear QKD source Wang et al [34] provides more possibilities for the future development of QKD chips. In this paper, a quantum encoding chip based on the SOI platform is designed, which can convert path-encoded information into polarization-encoded information output for communication in fibers.…”

Section: Introductionmentioning

confidence: 99%

Integrated silicon photonics chip fabricated by CMOS compatible technology for low-bit-error-rate quantum key distribution

Zhen,

Jin,

Jie

et al. 2023

J. Opt.

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Quantum communication has extremely high security and is a development direction of future communication networks. In this paper, an on-chip path, off-chip polarization encoded quantum key distribution chip is designed and fabricated using advanced silicon photonics fabrication technology. Using a special two-dimensional grating, we can convert light of different path states into corresponding polarization states and propagate in fiber. The performance of the basic optics, waveguides, gratings, and Mach-Zehnder interferometers on the chip is characterized. In the demonstrated quantum key distribution experiment, the quantum bit error rate is as low as 1.08%. It provides an important device for the future development of advanced integrated quantum information.

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Fully Passive Quantum Key Distribution

Cited by 23 publications

References 47 publications

Q-ECS: Quantum-Enhanced Cloud Security with Attribute-based Cryptography and Quantum Key Distribution

Q-ECS: Quantum-Enhanced Cloud Security with Attribute-based Cryptography and Quantum Key Distribution

Security of the Decoy-State BB84 Protocol with Imperfect State Preparation

Integrated silicon photonics chip fabricated by CMOS compatible technology for low-bit-error-rate quantum key distribution

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