A new efficient two-party semi-quantum key agreement protocol is proposed with high-dimensional single-particle states. Different from the previous semi-quantum key agreement protocols based on the two-level quantum system, the propounded protocol makes use of the advantage of the high-dimensional quantum system, which possesses higher efficiency and better robustness against eavesdropping. Besides, the protocol allows the classical participant to encode the secret key with qudit shifting operations without involving any quantum measurement abilities. The designed semi-quantum key agreement protocol could resist both participant attacks and outsider attacks. Meanwhile, the conjoint analysis of security and efficiency provides an appropriate choice for reference on the dimension of single-particle states and the number of decoy states.
Received: 14 July 2020
Revised: 05 August 2020
Accepted manuscript online: 13 August 2020
Fund: the National Natural Science Foundation of China (Grant Nos. 61871205 and 61561033) and the Major Academic Discipline and Technical Leader of Jiangxi Province, China (Grant No. 20162BCB22011).
Huan-Huan Li(李欢欢), Li-Hua Gong(龚黎华), and Nan-Run Zhou(周南润) New semi-quantum key agreement protocol based on high-dimensional single-particle states 2020 Chin. Phys. B 29 110304
Measurement result
Encoding result
|0〉
0
|1〉
1
⋮
⋮
|d – 1〉
d – 1
Table 1.
Encoding rule.
Fig. 1.
Probability of detected eavesdropping.
Fig. 2.
Relationship between efficiency and dimension.
QR
QC
QPNQO
CPNO
Efficiency/%
Ref. [3]
single photon
1
SPUO+SPM
None
16.67
Ref. [28]
Bell state
2
SPUO+BM
CBM+PO+RO+PP
9.09
Ref. [29]
Bell state
4
SPM+BM
CBM+PO+RO
6.7
Ref. [30]
cluster state
4
SPM+BM+FPOM
CBM+RO+PP
2.08
Ours
single photon
3
SPM
QSO+PO+RO
Table 2.
Comparisons of some typical protocols and our protocol.
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