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Improving the longevity of optically-read quantum dot physical unclonable functions

Improving the longevity of optically-read quantum dot physical unclonable functions
Improving the longevity of optically-read quantum dot physical unclonable functions
Quantum dot physically unclonable functions (QD-PUFs) provide a promising solution to the issue of counterfeiting. When quantum dots are deposited on a surface to create a token, they form a unique pattern that is unlikely to ever be reproduced in another token that is manufactured using the same process. It would also be an extreme engineering challenge to deterministically place quantum dots to create a forgery of a specific device. The degradation of the optical response of quantum dots over time, however, places a limitation on their practical usefulness. Here we report methods to minimise the degradation of photoluminescence (PL) from InP/ZnS quantum dots suspended in a polymer and demonstrate reliable authentication using a fingerprinting technique to extract a signature from PL, even after significant degradation has occurred. Using these techniques, it was found that the addition of a polylauryl methacrylate (PLMA) copolymer improved the longevity of devices. The best performing example of this was the Polystyrene-PLMA based material. From this, it is projected that 1000 bits of information could be extracted and read after a period of years, therefore providing a compelling solution to the issue of counterfeiting.
2045-2322
Longmate, Kieran D.
2ac8bd5e-cbf1-4d9a-adcb-65dedf244b9b
Abdelazim, Nema
2ac8bd5e-cbf1-4d9a-adcb-65dedf244b9b
Ball, Elliott M
e541e7f0-28f5-4a08-8381-53804cebc1ff
Majaniemi, Joonas
fec4b3b8-3a3c-405b-a1a0-4de4d334bc98
Young, Robert J.
c31b612b-8b0b-4bbd-9454-62124294758d
Longmate, Kieran D.
2ac8bd5e-cbf1-4d9a-adcb-65dedf244b9b
Abdelazim, Nema
2ac8bd5e-cbf1-4d9a-adcb-65dedf244b9b
Ball, Elliott M
e541e7f0-28f5-4a08-8381-53804cebc1ff
Majaniemi, Joonas
fec4b3b8-3a3c-405b-a1a0-4de4d334bc98
Young, Robert J.
c31b612b-8b0b-4bbd-9454-62124294758d

Longmate, Kieran D., Abdelazim, Nema, Ball, Elliott M, Majaniemi, Joonas and Young, Robert J. (2021) Improving the longevity of optically-read quantum dot physical unclonable functions. Scientific Reports, 11 (1), [10999]. (doi:10.1038/s41598-021-90129-2).

Record type: Article

Abstract

Quantum dot physically unclonable functions (QD-PUFs) provide a promising solution to the issue of counterfeiting. When quantum dots are deposited on a surface to create a token, they form a unique pattern that is unlikely to ever be reproduced in another token that is manufactured using the same process. It would also be an extreme engineering challenge to deterministically place quantum dots to create a forgery of a specific device. The degradation of the optical response of quantum dots over time, however, places a limitation on their practical usefulness. Here we report methods to minimise the degradation of photoluminescence (PL) from InP/ZnS quantum dots suspended in a polymer and demonstrate reliable authentication using a fingerprinting technique to extract a signature from PL, even after significant degradation has occurred. Using these techniques, it was found that the addition of a polylauryl methacrylate (PLMA) copolymer improved the longevity of devices. The best performing example of this was the Polystyrene-PLMA based material. From this, it is projected that 1000 bits of information could be extracted and read after a period of years, therefore providing a compelling solution to the issue of counterfeiting.

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s41598-021-90129-2 - Version of Record
Available under License Creative Commons Attribution.
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More information

Accepted/In Press date: 26 April 2021
e-pub ahead of print date: 26 May 2021
Published date: 1 December 2021

Identifiers

Local EPrints ID: 452152
URI: http://eprints.soton.ac.uk/id/eprint/452152
ISSN: 2045-2322
PURE UUID: ae3437b7-2edc-44bf-b996-ce4be4fb559c

Catalogue record

Date deposited: 25 Nov 2021 21:43
Last modified: 25 Nov 2021 21:43

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Contributors

Author: Kieran D. Longmate
Author: Nema Abdelazim
Author: Elliott M Ball
Author: Joonas Majaniemi
Author: Robert J. Young

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