Growing concern about data theft and counterfeiting has inspired increasingly sophisticated security technologies, like hologram seals, that can help verify the authenticity of currency, passports and other important documents. However, as security technologies evolve, so do the techniques criminals use to get past them.
New anti-counterfeit technique packs two light-reactive images into one material retrieved 30 May 2024 from https://phys.org/news/2024-05-anti-counterfeit-technique-reactive-images.html
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