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Round-robin differential-phase-shift quantum key distribution with a passive decoy state method

View Article: PubMed Central - PubMed

ABSTRACT

Recently, a new type of protocol named Round-robin differential-phase-shift quantum key distribution (RRDPS QKD) was proposed, where the security can be guaranteed without monitoring conventional signal disturbances. The active decoy state method can be used in this protocol to overcome the imperfections of the source. But, it may lead to side channel attacks and break the security of QKD systems. In this paper, we apply the passive decoy state method to the RRDPS QKD protocol. Not only can the more environment disturbance be tolerated, but in addition it can overcome side channel attacks on the sources. Importantly, we derive a new key generation rate formula for our RRDPS protocol using passive decoy states and enhance the key generation rate. We also compare the performance of our RRDPS QKD to that using the active decoy state method and the original RRDPS QKD without any decoy states. From numerical simulations, the performance improvement of the RRDPS QKD by our new method can be seen.

No MeSH data available.


Related in: MedlinePlus

Key generation rate vs the transmission distance in RRDPS QKD with the passive decoy state method (solid line), the active decoy state method (dashed line; ref.31) and no decoy state (dot-dashed line; ref. 17).
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f2: Key generation rate vs the transmission distance in RRDPS QKD with the passive decoy state method (solid line), the active decoy state method (dashed line; ref.31) and no decoy state (dot-dashed line; ref. 17).

Mentions: According to the security analysis in above section, we can get the key generation rate Eq. (8) plotted in Fig. 2.


Round-robin differential-phase-shift quantum key distribution with a passive decoy state method
Key generation rate vs the transmission distance in RRDPS QKD with the passive decoy state method (solid line), the active decoy state method (dashed line; ref.31) and no decoy state (dot-dashed line; ref. 17).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5304156&req=5

f2: Key generation rate vs the transmission distance in RRDPS QKD with the passive decoy state method (solid line), the active decoy state method (dashed line; ref.31) and no decoy state (dot-dashed line; ref. 17).
Mentions: According to the security analysis in above section, we can get the key generation rate Eq. (8) plotted in Fig. 2.

View Article: PubMed Central - PubMed

ABSTRACT

Recently, a new type of protocol named Round-robin differential-phase-shift quantum key distribution (RRDPS QKD) was proposed, where the security can be guaranteed without monitoring conventional signal disturbances. The active decoy state method can be used in this protocol to overcome the imperfections of the source. But, it may lead to side channel attacks and break the security of QKD systems. In this paper, we apply the passive decoy state method to the RRDPS QKD protocol. Not only can the more environment disturbance be tolerated, but in addition it can overcome side channel attacks on the sources. Importantly, we derive a new key generation rate formula for our RRDPS protocol using passive decoy states and enhance the key generation rate. We also compare the performance of our RRDPS QKD to that using the active decoy state method and the original RRDPS QKD without any decoy states. From numerical simulations, the performance improvement of the RRDPS QKD by our new method can be seen.

No MeSH data available.


Related in: MedlinePlus