公开(公告)号：WO2022015241A1

公开(公告)日：2022-01-20

申请号：PCT/SG2021/050408

申请日：2021-07-13

Applicant: NATIONAL UNIVERSITY OF SINGAPORE

Inventor： WANG, Chao ,  LIM, Ci Wen ,  GOH, Koon Tong

IPC: H04B10/27 ,  H04B10/079 ,  H04B10/50 ,  H04B10/60 ,  H04L9/08

Abstract: A measurement-device-independent (MDI) quantum key distribution (QKD) network, a method of operating an MDI QKD network comprising a common server and a plurality of user systems, a user system for a MDI QKD network, and a method of operating a user system for a MDI QKD network. The method of operating an MDI QKD network comprising a common server and a plurality of user systems comprises the steps of performing optical pulse generation and distribution using a laser source at the common server; receiving the optical pulses at the user systems from the common server; modulating the optical pulses at the user systems for quantum communication; re-transmitting the modulated optical pulses from the user systems to the common server; and using an energy bounding component at each of the user system for limiting Trojan horse attack (THA).

公开(公告)号：WO2022124984A1

公开(公告)日：2022-06-16

申请号：PCT/SG2021/050737

申请日：2021-11-30

Applicant: NATIONAL UNIVERSITY OF SINGAPORE [SG]/[SG]

Inventor： GOH, Koon Tong ,  LOH, Chee Ping George ,  LIM, Ci Wen

IPC: H04L9/08 ,  G06N10/00

Abstract: A method of using a quantum random number generator, QRNG, for security applications, a system for security applications, and a user device for a system for security applications. The method comprises the steps of generating one or more quantum keys using the QRNG; storing, using a secure network, corresponding sets of the quantum keys in a server located at a controlled access location and in a quantum key token, QKT, for a user, respectively; and using the corresponding sets of quantum keys for secure transmission between the server and a user device comprising the QKT when outside the secure network or for access control to the controlled access location.

公开(公告)号：WO2022225451A1

公开(公告)日：2022-10-27

申请号：PCT/SG2022/050195

申请日：2022-04-05

Applicant: NATIONAL UNIVERSITY OF SINGAPORE

Inventor： PRIMAATMAJA, Ignatius William ,  LIM, Ci Wen ,  GOH, Koon Tong

IPC: G06F7/58 ,  H04L9/08

Abstract: A method for providing a semi-device-independent random output signal, and a system for providing a semi-device-independent random output signal. The method comprises the steps of providing respective coherent laser signals of a same optical mode in a signal arm and a local oscillator arm between a quantum signal source, Alice, and at a quantum signal detector, Bob; Alice and Bob randomly selecting operation in a test mode or a randomness generation mode for each of n rounds; generating a raw random string from bit values bi of rounds in which randomness generation mode was chosen, and using rounds in which test mode was chosen to estimate an entropy of the raw random string.

公开(公告)号：WO2022010418A1

公开(公告)日：2022-01-13

申请号：PCT/SG2021/050393

申请日：2021-07-07

Applicant: NATIONAL UNIVERSITY OF SINGAPORE

Inventor： WANG, Chao ,  LIM, Ci Wen ,  GOH, Koon Tong

IPC: H04B10/548 ,  H04B10/27 ,  H04B10/60 ,  H04L9/08

Abstract: A method of encoding quantum information on one or several degrees of freedom of coherent states of photons of a baseband input optical signal, a quantum transmitter, and a computer-readable medium. The quantum transmitter comprises a modulator configured to encode quantum information on one or several degrees of freedom of coherent states of photons of a baseband input optical signal using sideband modulation of the baseband optical input signal.