14:00 〜 14:15
▼ [5p-A414-4] MDI-DPS-QKD with no joint measurement
キーワード：quantum key distribution, measurement device independent, DPS-QKD
Measurement device independent quantum key distribution (MDI-QKD) was proposed to be free from
side-channel attacks utilizing imperfections in measurement devices. In conventional MDI-QKD, Alice and Bob
respectively prepare one of four BB84 states and send it to Charlie who performs Bell state measurement (BSM) on
Alice’s and Bob’s signals. Afterwards, Charlie announces the measurement result through a public channel. Alice and
Bob then create a key bit according to Charlie’s information and their own data. The main experimental challenge of
MDI-QKD is to establish synchronization in term of the timing, the polarization state, the temporal and spectrum
shapes for the BSM. In order to avoid such experimental difficulties, this paper proposes a new scheme of MDI-QKD
based on differential phase shift (DPS) quantum secret sharing (QSS)[1], which features no use of BSM. Compared
to conventional MDI-QKD scheme, the proposed scheme presents a simple setup, suitable for practical
implementation.
side-channel attacks utilizing imperfections in measurement devices. In conventional MDI-QKD, Alice and Bob
respectively prepare one of four BB84 states and send it to Charlie who performs Bell state measurement (BSM) on
Alice’s and Bob’s signals. Afterwards, Charlie announces the measurement result through a public channel. Alice and
Bob then create a key bit according to Charlie’s information and their own data. The main experimental challenge of
MDI-QKD is to establish synchronization in term of the timing, the polarization state, the temporal and spectrum
shapes for the BSM. In order to avoid such experimental difficulties, this paper proposes a new scheme of MDI-QKD
based on differential phase shift (DPS) quantum secret sharing (QSS)[1], which features no use of BSM. Compared
to conventional MDI-QKD scheme, the proposed scheme presents a simple setup, suitable for practical
implementation.