Using intrinsic properties of quantum dots to provide additional security when uniquely identifying devices.

ABSTRACT: Unique identification of optical devices is important for anti-counterfeiting. Physical unclonable functions (PUFs), which use random physical characteristics for authentication, are advantageous over existing optical solutions, such as holograms, due to the inherent asymmetry in their fabrication and reproduction complexity. However, whilst unique, PUFs are potentially vulnerable to replication and simulation. Here we introduce an additional benefit of a small modification to an established model of nanoparticle PUFs by using a second measurement parameter to verify their authenticity. A randomly deposited array of quantum dots is encapsulated in a transparent polymer, forming a tag. Photoluminescence is measured as a function of excitation power to assess uniqueness as well as the intrin

SUBMITTER: Fong MJ 

PROVIDER: S-EPMC9547896 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature