Improving the total efficiency of quantum key distribution by comparing Bell states

Yuan, Hao; Song, Jun; Han, Le; Hou, Kui; Shou-Hua, Shi

doi:10.1016/j.optcom.2008.06.010

Cited by 26 publications

(16 citation statements)

References 28 publications

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“…The early entanglement-based QKDs protocols depend on the use of alternative measurements, where Alice and Bob use several measurement bases and alternate between them randomly, to make the protocols secure against any eavesdropper attack such as Ekert protocol [4]. This approach has been used in several entanglement-swapping-based QKD, see the correlation Equation ( 8), as well as in [11], [12], [13], [14]. There are two main drawbacks of the use of alternative measurements.…”

Section: Related Workmentioning

confidence: 99%

“…First of all, only a small portion of transmitted/measured quantum states is used to generate the key while the others are for eavesdropper interference detection, which reduces the key-bit rate. Secondly, a quantum memory is required to store the quantum states sequences until Alice(Bob) tells the other party on the grouped qubits indices and on what basis the measurement should be performed, which makes such solutions impractical for limited resources devices [13], [12], [11]. The advantage of such solutions is that these protocols can differentiate between bit-errorrate (related to device malfunction of state incoherence) and quantum-bit-error (related to Eve interference).…”

Section: Related Workmentioning

confidence: 99%

“…Similarly, the swapped state of [10] violates the CHSH Bell inequality by more than 4 standard deviations and they concluded that the obtained entangled states could be directly used for QKD. ES is used in several QKD protocols such as [11], [12], [13], [14], where the fact that both Alice and Bob must select randomly between two potential measurements ensures the security of these protocols. Conversely, several entanglement-swapping-based protocols that do not require alternative measurements have been proposed in the literature, first appearing in Cabello's work [15].…”

Section: Introductionmentioning

confidence: 99%

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QKeyShield: A Practical Receiver-Device-Independent Entanglement-Swapping-Based Quantum Key Distribution

2022

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Quantum key distribution, in principle, provides information-theoretic security based on the laws of quantum mechanics. Entanglement swapping offers a unique ability to create entanglement between qubits that have not previously interacted. Entanglement-swapping setup helps in building a side-channelfree Quantum key distribution. A receiver-device-independent quantum key distribution protocol based on this idea, QKeyShield, is proposed. It adopts the use of a biased operator choice, thus, increasing the rate of generated bits. Several measures have been integrated to protect the sent qubits. Furthermore, security analyses for a list of attacks allowed by quantum mechanics are provided showing that QKeyShield can securely and effectively allow Alice and Bob to agree on a secret key. QKeyShield has certain advantages over earlier protocols including the ability to achieve high usage efficiency and the potential of enabling conference quantum key distribution.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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QKeyShield: A Practical Receiver-Device-Independent Entanglement-Swapping-Based Quantum Key Distribution

2022

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“…In fact, the coding rate reaches unity. The QKD protocol in Reference [ 34 ] exhibits a total efficiency of the communication to come up to 100%, but it does not define an error correction algorithm.…”

Section: Communication Modelmentioning

confidence: 99%

Beyond the Limits of Shannon’s Information in Quantum Key Distribution

Lizama-Pérez

Samperio

2021

Entropy

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We present a new post-processing method for Quantum Key Distribution (QKD) that raises cubically the secret key rate in the number of double matching detection events. In Shannon’s communication model, information is prepared at Alice’s side, and it is then intended to pass it over a noisy channel. In our approach, secret bits do not rely in Alice’s transmitted quantum bits but in Bob’s basis measurement choices. Therefore, measured bits are publicly revealed, while bases selections remain secret. Our method implements sifting, reconciliation, and amplification in a unique process, and it just requires a round iteration; no redundancy bits are sent, and there is no limit in the correctable error percentage. Moreover, this method can be implemented as a post-processing software into QKD technologies already in use.

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“…In 1999, Shimizu and Imoto [15] proposed the first DSQC protocol, and another DSQC protocol based on single photon two-qubit states was presented by Beige et al in 2002. [16] Thereafter, many advanced DSQC protocols have been already introduced, [17−34] including the protocols using the entangled states, [21][22][25][26][29][30][31][32]34] such as EPR pairs, GHZ states, W states, cluster states and so on, and the proto-cols employing the rearrangement technique of the particle order, [22][23][24][27][28]33] etc.…”

Section: Introductionmentioning

confidence: 99%

A Novel Deterministic Secure Quantum Communication Scheme with Einstein—Podolsky—Rosen Pairs and Single Photons

Wang¹,

Liu²,

Liu³

et al. 2013

Commun. Theor. Phys.

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A novel deterministic secure quantum communication (DSQC) scheme is presented based on Einstein-Podolsky-Rosen (EPR) pairs and single photons in this study. In this scheme, the secret message can be encoded directly on the first particles of the prepared Bell states by simple unitary operations and decoded by performing the Bell-basis measurement after the additional classic information is exchanged. In addition, the strategy with two-step transmission of quantum data blocks and the technique of decoy-particle checking both are exploited to guarantee the security of the communication. Compared with some previous DSQC schemes, this scheme not only has a higher resource capacity, intrinsic efficiency and total efficiency, but also is more realizable in practical applications. Security analysis shows that the proposed scheme is unconditionally secure against various attacks over an ideal quantum channel and still conditionally robust over a noisy and lossy quantum channel.

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Improving the total efficiency of quantum key distribution by comparing Bell states

Cited by 26 publications

References 28 publications

QKeyShield: A Practical Receiver-Device-Independent Entanglement-Swapping-Based Quantum Key Distribution

QKeyShield: A Practical Receiver-Device-Independent Entanglement-Swapping-Based Quantum Key Distribution

Beyond the Limits of Shannon’s Information in Quantum Key Distribution

A Novel Deterministic Secure Quantum Communication Scheme with Einstein—Podolsky—Rosen Pairs and Single Photons

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