Noiseless attack and counterfactual security of quantum key distribution

Rao, Vinod N.; Srikanth, R.

doi:10.1103/physreva.104.022424

Cited by 9 publications

(6 citation statements)

References 22 publications

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“…Following this, an in-depth analysis of the counterfactual quantum key distribution scheme was made [23][24][25][26][27][28]. Key rate in the counterfactual quantum key distribution scheme [23] can be improved by inclusion of non-counterfactual key bits [29]. This type of unconventional scheme for transferring information with no quantum or classical particle present in the transmission channel present between the two parties is known as 'counterfactual quantum communication' [30].…”

Section: Introductionmentioning

confidence: 99%

Quantum networks using counterfactual quantum communication

Warke,

Thapliyal,

Pathak

2024

Phys. Scr.

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Counterfactual quantum communication is one of the most interesting facets of quantum communication, allowing two parties to communicate without any transmission of quantum or classical particles between the parties involved in the communication process. This aspect of quantum communication originates from the interaction-free measurements where the chained quantum Zeno effect plays an important role. Here, we propose a new counterfactual quantum communication protocol for transmitting an entangled state from a pair of electrons to two independent photons. Interestingly, the protocol proposed here shows that the counterfactual method can be employed to transfer information from house qubits to flying qubits. Following this, we show that the protocol finds uses in building quantum repeaters leading to a counterfactual quantum network, enabling counterfactual communication over a linear quantum network. 

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Section: Introductionmentioning

confidence: 99%

Quantum networks using counterfactual quantum communication

Warke,

Thapliyal,

Pathak

2024

Phys. Scr.

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“…In this paper, in combination with noiseless counterfactual quantum key distribution [13], communication parties can achieve resistance to noiseless attacks by randomly applying the flipping operation R k . During the security verification process, the response probabilities of each detection responder are checked to see if they meet the specified target.…”

Section: Introductionmentioning

confidence: 99%

Quantum privacy query protocol based on counterfactual quantum key distribution with noiseless attack

Liu,

Li,

Chen

et al. 2024

Preprint

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To save quantum resources and improve efficiency, this article proposes an efficient counterfactual quantum privacy query protocol. Counterfactual quantum privacy query refers to the identification of secure detection and key screening based on the detector's response results without the actual transmission of quantum information between user Bob and database Alice. Alice completes key transmission through a counterfactual device, while Bob measures the photon's polarization with a probability of 1/2 to obtain the encoded classical information, followed by traditional post-processing and privacy query operations. Additionally, to withstand the noise impact during the communication process, a modified counterfactual QKD protocol proposed by Rao (2021) is utilized, where communication parties randomly select a quantum bit flip with a specified probability \textit{f}, and then complete the quantum privacy query.

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“…In 2021, in Ref. [15] , Rao et al proposed a novel CQKD to improve the efficiency by including noncounterfactual key bits. In Rao21 protocol, the key generation rate reaches 25%, which is the level of BB84 protocol.…”

Section: Introductionmentioning

confidence: 99%