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Related Experiment Videos

Secure multi-party biometric verification using QKD assisted quantum oblivious transfer.

Mariana F Ramos1, Michael Hentschel2, Federico Valbusa3

  • 1Infineon Technologies Austria AG, Siemensstraße 2, Villach, 9500, Austria. Mariana.FerreiraRamos@infineon.com.

Scientific Reports
|June 28, 2026
PubMed
Summary

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When one or more data points appear far from the rest of the data, there is a need to determine whether they are outliers and whether they should be eliminated from the data set to ensure an accurate representation of the measured value. In many cases, outliers arise from gross errors (or human errors) and do not accurately reflect the underlying phenomenon. In some cases, however, these apparent outliers reflect true phenomenological differences. In these cases, we can use statistical methods...

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This summary is machine-generated.

We demonstrate a practical quantum oblivious transfer (QOT) system for secure multiparty computation. This quantum key distribution (QKD)-authenticated system enables privacy-preserving applications like fingerprint matching.

Area of Science:

  • Quantum Information Science
  • Quantum Cryptography
  • Secure Multiparty Computation

Background:

  • Secure multiparty computation (SMC) enables multiple parties to jointly compute a function over their private inputs without revealing them.
  • Quantum oblivious transfer (QOT) is a fundamental primitive for building secure SMC protocols.
  • Existing QOT implementations face challenges in terms of efficiency and integration with secure authentication.

Purpose of the Study:

  • To present an experimentally feasible implementation of QOT on an entanglement-based quantum communication system.
  • To integrate QOT with quantum key distribution (QKD) for authentication, enhancing security and efficiency.
  • To demonstrate a practical application of the developed QOT system for privacy-preserving data matching.

Main Methods:

Keywords:
Beyond QKDMultiparty computationOblivious transferPrivacySecurity

Related Experiment Videos

  • Utilized polarization-encoded entangled states for QOT key sharing.
  • Integrated QOT post-processing with a QKD pipeline for authentication.
  • Employed a parallel QKD channel specifically for message authentication.
  • Demonstrated a privacy-preserving fingerprint matching protocol (MASCOT) using QOT.

Main Results:

  • Achieved QOT key generation over 25.8 km with 8.47 dB channel loss.
  • Demonstrated a QOT rate of 0.005 OTs/second (1 min 53 sec/OT) in a back-to-back setup.
  • Improved QOT rate to 0.11 OTs/second (9.1 sec/OT) using pre-distributed keys.
  • Successfully executed a privacy-preserving fingerprint matching application requiring 128 1-out-of-2 OTs.

Conclusions:

  • The implemented QOT system is statistically correct and computationally secure.
  • The integration of QOT with QKD provides an efficient and secure foundation for SMC applications.
  • This work validates the feasibility of QOT for real-world secure quantum communication scenarios, such as border control.