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Improving semi-device-independent randomness certification by entropy accumulation

i Carceller, Carles Roch LU orcid ; Faria, Lucas Nunes ; Liu, Zheng Hao ; Sguerso, Nicolò ; Andersen, Ulrik Lund ; Neergaard-Nielsen, Jonas Schou and Brask, Jonatan Bohr (2025) In Physical Review A 112(2).
Abstract

Certified randomness guaranteed to be unpredictable by adversaries is central to information security. The fundamental randomness inherent in quantum physics makes certification possible from devices that are only weakly characterized, i.e., requiring little trust in their implementation. It was recently shown that the amount of certifiable randomness can be improved using the so-called entropy accumulation theorem generalized to prepare-and-measure settings. Furthermore, this approach allows a finite-size analysis which avoids assuming that all rounds are independent and identically distributed. Here, we demonstrate this improvement in semi-device-independent randomness certification from untrusted measurements.

Please use this url to cite or link to this publication:
author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A
volume
112
issue
2
article number
022430
publisher
American Physical Society
external identifiers
  • scopus:105019772996
ISSN
2469-9926
DOI
10.1103/dwdv-89bj
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2025 American Physical Society
id
77100dc0-10a0-42ac-96cc-3b8fa0261982
date added to LUP
2025-12-18 12:46:16
date last changed
2025-12-18 12:47:22
@article{77100dc0-10a0-42ac-96cc-3b8fa0261982,
  abstract     = {{<p>Certified randomness guaranteed to be unpredictable by adversaries is central to information security. The fundamental randomness inherent in quantum physics makes certification possible from devices that are only weakly characterized, i.e., requiring little trust in their implementation. It was recently shown that the amount of certifiable randomness can be improved using the so-called entropy accumulation theorem generalized to prepare-and-measure settings. Furthermore, this approach allows a finite-size analysis which avoids assuming that all rounds are independent and identically distributed. Here, we demonstrate this improvement in semi-device-independent randomness certification from untrusted measurements.</p>}},
  author       = {{i Carceller, Carles Roch and Faria, Lucas Nunes and Liu, Zheng Hao and Sguerso, Nicolò and Andersen, Ulrik Lund and Neergaard-Nielsen, Jonas Schou and Brask, Jonatan Bohr}},
  issn         = {{2469-9926}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{2}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review A}},
  title        = {{Improving semi-device-independent randomness certification by entropy accumulation}},
  url          = {{http://dx.doi.org/10.1103/dwdv-89bj}},
  doi          = {{10.1103/dwdv-89bj}},
  volume       = {{112}},
  year         = {{2025}},
}