Mismatched-basis statistics enable quantum key distribution with uncharacterized qubit sources

Yin, Zhen-Qiang; Fung, Chi-Hang Fred; Ma, Xiongfeng; Zhang, Chun-Mei; Li, Hongwei; Chen, Wei; Wang, Shuang; Guo, Guang‐Can; Han, Zheng‐Fu

doi:10.1103/physreva.90.052319

Cited by 59 publications

(27 citation statements)

References 53 publications

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“…Another interesting line of research would be to look at the semi-device-independent security of our protocol assuming that the dimension of the verifier's quantum challenges (states) is fixed. Several results have been obtained in this direction for measurement-device-independent QKD [35,36], to which suggest that similar conclusions could hold for our QPV protocol.…”

Section: Discussionsupporting

confidence: 64%

Loss-tolerant quantum secure positioning with weak laser sources

Lim¹,

Xu²,

Siopsis³

et al. 2016

Phys. Rev. A

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Quantum position verification (QPV) is the art of verifying the geographical location of an untrusted party. Recently, it has been shown that the widely studied Bennett & Brassard 1984 (BB84) QPV protocol is insecure after the 3 dB loss point assuming local operations and classical communication (LOCC) adversaries. Here, we propose a time-reversed entanglement swapping QPV protocol (based on measurement-device-independent quantum cryptography) that is highly robust against quantum channel loss. First, assuming ideal qubit sources, we show that the protocol is secure against LOCC adversaries for any quantum channel loss, thereby overcoming the 3 dB loss limit. Then, we analyze the security of the protocol in a more practical setting involving weak laser sources and linear optics. In this setting, we find that the security only degrades by an additive constant and the protocol is able to verify positions up to 47 dB channel loss.

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Section: Discussionsupporting

confidence: 64%

Loss-tolerant quantum secure positioning with weak laser sources

Lim¹,

Xu²,

Siopsis³

et al. 2016

Phys. Rev. A

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“…A similar result was recovered numerically in [24] for general qubit POVMs on Alice's side, assuming that Bob also performs qubit measurements. The prepare-and-measure version of BB84 was also studied numerically in [25] at a similar level of device independence, where Alice's source prepares unknown pure qubit states and Bob performs unknown projective qubit measurements.…”

Section: Bb84 and Device Independencementioning

confidence: 99%

Semi device independence of the BB84 protocol

Woodhead

2016

New J. Phys.

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The BB84 quantum key distribution protocol is semi device independent in the sense that it can be shown to be secure if just one of the users' devices is restricted to a qubit Hilbert space. Here, we derive an analytic lower bound on the asymptotic secret key rate for the entanglement-based version of BB84 assuming only that one of the users performs unknown qubit POVMs. The result holds against the class of collective attacks and reduces to the well known Shor-Preskill key rate for correlations corresponding to the ideal BB84 correlations mixed with any amount of random noise.

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“…Besides, we provide a concise security analysis for both the single-photon case and the decoy-state case, using a virtual-photon qubit idea. Compared with the existing protocol [51][52][53][54][55], the security proof of our protocol is much more straightforward, and the data post-processing is easier to be applied for experimentists. Simulation with realistic experimental parameters also shows that our protocol has a promising performance, and thus can be applied to practical QKD applications.…”

Section: Arxiv:170404371v3 [Quant-ph] 17 Jan 2018mentioning

confidence: 99%

“…Furthermore, several protocols have been proposed [51][52][53][54][55] to relax the assumptions on the encoding systems. By modifying the original MDI-QKD and assuming qubit sources, Yin et al [51,52] have proved that MDI-QKD can still be secure with uncharacterized encoding systems. In [53], MDI-QKD based on the CHSH inequality (CHSH-MDI-QKD) has been investigated, in which the state is prepared in the twodimensional Hilbert space.…”

Section: Introductionmentioning

confidence: 99%

One-sided measurement-device-independent quantum key distribution

et al. 2018

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Measurement-device-independent quantum key distribution (MDI-QKD) protocol was proposed to remove all the detector side channel attacks, while its security relies on the trusted encoding systems. Here we propose a one-sided MDI-QKD (1SMDI-QKD) protocol, which enjoys detection loophole-free advantage, and at the same time weakens the state preparation assumption in MDI-QKD. The 1SMDI-QKD can be regarded as a modified MDI-QKD, in which Bob's encoding system is trusted, while Alice's is uncharacterized. For the practical implementation, we also provide a scheme by utilizing coherent light source with an analytical two decoy state estimation method. Simulation with realistic experimental parameters shows that the protocol has a promising performance, and thus can be applied to practical QKD applications.

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Mismatched-basis statistics enable quantum key distribution with uncharacterized qubit sources

Cited by 59 publications

References 53 publications

Loss-tolerant quantum secure positioning with weak laser sources

Loss-tolerant quantum secure positioning with weak laser sources

Semi device independence of the BB84 protocol

One-sided measurement-device-independent quantum key distribution

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