Brandão, FGSL;
Ramanathan, R;
Grudka, A;
Horodecki, K;
Horodecki, M;
Horodecki, P;
Szarek, T;
(2016)
Realistic noise-tolerant randomness amplification using finite number of devices.
Nature Communications
, 7
, Article 11345. 10.1038/ncomms11345.
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Abstract
Randomness is a fundamental concept, with implications from security of modern data systems, to fundamental laws of nature and even the philosophy of science. Randomness is called certified if it describes events that cannot be pre-determined by an external adversary. It is known that weak certified randomness can be amplified to nearly ideal randomness using quantum-mechanical systems. However, so far, it was unclear whether randomness amplification is a realistic task, as the existing proposals either do not tolerate noise or require an unbounded number of different devices. Here we provide an error-tolerant protocol using a finite number of devices for amplifying arbitrary weak randomness into nearly perfect random bits, which are secure against a no-signalling adversary. The correctness of the protocol is assessed by violating a Bell inequality, with the degree of violation determining the noise tolerance threshold. An experimental realization of the protocol is within reach of current technology.
| Type: | Article |
|---|---|
| Title: | Realistic noise-tolerant randomness amplification using finite number of devices |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/ncomms11345 |
| Publisher version: | http://dx.doi.org/10.1038/ncomms11345 |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1496852 |
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