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Experimental Boson Sampling Enabling Cryptographic One-Way Function. | LitMetric

Experimental Boson Sampling Enabling Cryptographic One-Way Function.

Phys Rev Lett

Center for Integrated Quantum Information Technologies (IQIT), School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, China.

Published: February 2023

AI Article Synopsis

  • * This study experimentally evaluates the efficiency and security of a one-way cryptographic function based on coarse-grained boson sampling using a specialized photonic machine.
  • * Results indicate that the function can be implemented with significantly smaller sample sizes than previously expected, and it cannot be replicated by non-boson samplers when using a certain number of photons, marking a first step towards exploring boson sampling's applications in cryptography.

Article Abstract

Boson sampling is a computational problem, which is commonly believed to be a representative paradigm for attaining the milestone of quantum advantage. So far, massive efforts have been made to the experimental large-scale boson sampling for demonstrating this milestone, while further applications of the machines remain a largely unexplored area. Here, we investigate experimentally the efficiency and security of a cryptographic one-way function that relies on coarse-grained boson sampling, in the framework of a photonic boson-sampling machine fabricated by a femtosecond laser direct writing technique. Our findings demonstrate that the implementation of the function requires moderate sample sizes, which can be over 4 orders of magnitude smaller than the ones predicted by the Chernoff bound; whereas for numbers of photons n≥3 and bins d∼poly(m,n), the same output of the function cannot be generated by nonboson samplers. Our Letter is the first experimental study that deals with the potential applications of boson sampling in the field of cryptography and paves the way toward additional studies in this direction.

Download full-text PDF

Source
http://dx.doi.org/10.1103/PhysRevLett.130.060802DOI Listing

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