Tattoo‐Like Multi‐Color Physically Unclonable Functions

Advanced anti‐counterfeiting and authentication approaches are in urgent need of the rapidly digitizing society. Physically unclonable functions (PUFs) attract significant attention as a new‐generation security primitive. The challenge is design and generation of multi‐color PUFs that can be univers...

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Bibliographic Details
Published in:Advanced optical materials 2024-04, Vol.12 (12), p.n/a
Main Authors: Kiremitler, N. Burak, Esidir, Abidin, Drake, Gryphon A., Yazici, Ahmet Faruk, Sahin, Furkan, Torun, Ilker, Kalay, Mustafa, Kelestemur, Yusuf, Demir, Hilmi Volkan, Shim, Moonsub, Mutlugun, Evren, Onses, M. Serdar
Format: Article
Language:English
Subjects:
Algorithms
Color
Digitization
electrospraying
Fluorescence
Optical properties
Photoluminescence
physically unclonable function
polymers
security labels
semiconductor nanocrystals
System effectiveness
Tattoos
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Summary:Advanced anti‐counterfeiting and authentication approaches are in urgent need of the rapidly digitizing society. Physically unclonable functions (PUFs) attract significant attention as a new‐generation security primitive. The challenge is design and generation of multi‐color PUFs that can be universally applicable to objects of varied composition, geometry, and rigidity. Herein, tattoo‐like multi‐color fluorescent PUFs are proposed and demonstrated. Multi‐channel optical responses are created by electrospraying of polymers that contain semiconductor nanocrystals with precisely defined photoluminescence. The universality of this approach enables the use of dot and dot‐in‐rod geometries with unique optical characteristics. The fabricated multi‐color PUFs are then transferred to a target object by using a temporary tattoo approach. Digitized keys generated from the red, green and blue fluorescence channels facilitate large encoding capacity and rapid authentication. Feature matching algorithms complement the authentication by direct image comparison, effectively alleviating constraints associated with imaging conditions. The strategy that paves the way for the development of practical, cost‐effective, and secure anticounterfeiting systems is presented. Tattoo‐like multi‐color encoding layers based on random processing of semiconductor nanocrystals of varied composition and geometry are reported. Additive deposition via chaotic electrospraying enables randomness and multiplexing, whereas the tattoo approach provides substrate independence.
ISSN:2195-1071
2195-1071
DOI:10.1002/adom.202302464