Device-Independent Quantum Key Distribution

Device-Independent Quantum Key Distribution (DI-QKD) is a next-generation approach to quantum cryptography that ensures security without requiring trust in the inner workings of the devices used. It relies only on the observation of nonlocal correlations, typically certified through violations of Bell inequalities. This makes DI-QKD robust against faulty or even maliciously designed devices, offering the strongest form of quantum communication security. We have made notable contributions to both DI-QKD and quantum random number generation (QRNG). Our group has advanced DI-QKD by developing protocols and conducting security analyses that address real-world device imperfections and potential quantum-computer-based attacks. In QRNG, we designed and optimized generators based on Bell inequality violations, ensuring device-independent randomness certification.

Selected publications

  • Generalized measurements on qubits in quantum randomness certification and expansion, P. Mironowicz, M. Grünfeld, M. Bourennane, Physical Review Applied 22 (4), 044041 (2024)
  • Experimental certification of more than one bit of quantum randomness in the two inputs and two outputs scenario, A.J.M. Seguinard, A. Piveteau, P. Mironowicz, M. Bourennane, New Journal of Physics 25 (11), 113022 (2023)
  • Self-testing nonprojective quantum measurements in prepare-and-measure experiments, A. Tavakoli, M. Smania, T. Vértesi, N. Brunner, M. Bourennane, Science Advances 6 (16), eaaw6664 (2020)
  • Experimental certification of an informationally complete quantum measurement in a device-independent protocol, M. Smania, P. Mironowicz, M. Nawareg, M. Pawłowski, A. Cabello, M. Bourennane, Optica 7 (2), 123-128 (2020)
  • Experimental characterisation of unsharp qubit measurements in a semi-device-independent setting, H. Anwer, S. Muhammad, W. Cherifi, N. Miklin, A. Tavakoli, M. Bourennane, arXiv preprint arXiv:2001.04768 (2020)
  • Experimental device-independent certification of a symmetric, informationally complete, positive operator-valued measure, M. Smania, P. Mironowicz, M. Nawareg, M. Pawlowski, A. Cabello, M. Bourennane, Quantum 3, 6.928 (2018)
  • Increased certification of semi-device independent random numbers using many inputs and more post-processing, P. Mironowicz, A. Tavakoli, A. Hameedi, B. Marques, M. Pawłowski, M. Bourennane, New Journal of Physics 18 (6), 065004 (2016)
  • Experimental measurement-device-independent entanglement detection, M. Nawareg, S. Muhammad, E. Amselem, M. Bourennane, Scientific Reports 5 (1), 8048 (2015)
  • Experimental device-independent tests of classical and quantum dimensions, J. Ahrens, P. Badziag, A. Cabello, M. Bourennane, Nature Physics 8 (8), 592-595 (2012)
  • Contextuality offers device-independent security, K. Horodecki, M. Horodecki, P. Horodecki, R. Horodecki, M. Pawlowski, M. Bourennane, arXiv preprint arXiv:1006.0468 (2010)