TY - GEN
T1 - Hybrid DV-CV QKD outperforming existing QKD protocols in terms of secret-key rate and achievable distance
AU - Djordjevic, Ivan B.
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/7
Y1 - 2019/7
N2 - To overcome the limitations of both discrete variable (DV) and continuous variable (CV) QKD protocols, in this paper, a hybrid DV-CV QKD protocol is proposed. In the proposed hybrid QKD protocol, Alice simultaneously performs discrete modulation (DM)-based encoding for CV-QKD subsystem and time-phase encoding for DV-QKD on a transmitter side. On receiver side, Bob employs a 1:2 optical space switch to select either DV-QKD receiver or CV-QKD receiver with the optimized probability of selection. Bob further performs the classical postprocessing applied to both subsystems so that resulting joint secure key is derived from both subsystems. The proposed hybrid QKD protocol significantly outperforms previously introduced both Gaussian modulation (GM)- and DM-based CV-QKD protocols as well as DV-QKD protocols in terms of both secret-key rate (SKR) and achievable transmission distance.
AB - To overcome the limitations of both discrete variable (DV) and continuous variable (CV) QKD protocols, in this paper, a hybrid DV-CV QKD protocol is proposed. In the proposed hybrid QKD protocol, Alice simultaneously performs discrete modulation (DM)-based encoding for CV-QKD subsystem and time-phase encoding for DV-QKD on a transmitter side. On receiver side, Bob employs a 1:2 optical space switch to select either DV-QKD receiver or CV-QKD receiver with the optimized probability of selection. Bob further performs the classical postprocessing applied to both subsystems so that resulting joint secure key is derived from both subsystems. The proposed hybrid QKD protocol significantly outperforms previously introduced both Gaussian modulation (GM)- and DM-based CV-QKD protocols as well as DV-QKD protocols in terms of both secret-key rate (SKR) and achievable transmission distance.
KW - Continuous variable (CV)-QKD
KW - Discrete modulation-based protocols
KW - Discrete variable (DV)-QKD
KW - Quantum key distribution (QKD)
KW - Weak coherent state-based CV-QKD protocols
UR - http://www.scopus.com/inward/record.url?scp=85073069158&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85073069158&partnerID=8YFLogxK
U2 - 10.1109/ICTON.2019.8840467
DO - 10.1109/ICTON.2019.8840467
M3 - Conference contribution
AN - SCOPUS:85073069158
T3 - International Conference on Transparent Optical Networks
BT - 21st International Conference on Transparent Optical Networks, ICTON 2019
PB - IEEE Computer Society
T2 - 21st International Conference on Transparent Optical Networks, ICTON 2019
Y2 - 9 July 2019 through 13 July 2019
ER -