Alvaro Yángüez

Oblivious transfer (OT) is a fundamental primitive in cryptography, allowing the construction of general multi-party computation. Recent results have proved the possibility of quantum protocols from one-way functions, which is expected to be weaker than the assumptions needed in OT in the classical setting. In particular, a recent result by Diamanti et al. provided a quantum protocol for OT considering practical aspects of the protocol, while maintaining its composable security. In this work, we provide the first experimental implementation of a composable oblivious transfer protocol from OWF. The setup implements a weak-coherent pulses BB84 state source in polarization encoding, whose experimental parameters are employed to optimize the theoretical security bounds. The obtained security parameters are then used to perform a secure execution of the protocol, whose performances are profiled and compared with the literature benchmark.

We present the implementation of a new simulation-secure quantum oblivious transfer protocol based on one-way functions. The protocol allows an efficient and noise-tolerant experimental realization, surpassing prior works' performances in terms of required quantum and classical resources. We provide the complete integration of a software and an experimental source, achieving a black-box implementation of the quantum oblivious transfer primitive, to be leveraged in the future for secure multiparty computation.

We present a new simulation-secure quantum oblivious transfer (QOT) protocol based on one-way functions in the plain model. With a focus on practical implementation, our protocol surpasses prior works in efficiency, promising feasible experimental realization. We address potential experimental errors and their correction, offering analytical expressions to facilitate the analysis of the required quantum resources. Technically, we achieve our results by achieving simulation security for QOT through an equivocal and relaxed-extractable quantum bit commitment.