Ferraro Antonio, Bruno Mauro Daniel Luigi, Papuzzo Giuseppe, Varchera Rosa, Forestiero Agostino, De Santo Maria Penolope, Caputo Roberto, Barberi Riccardo Cristofaro
Physics Department, University of Calabria, 87036 Rende, Italy.
Consiglio Nazionale delle Ricerche-Istituto di Nanotecnologia (CNR-Nanotec), 87036 Rende, Italy.
Nanomaterials (Basel). 2022 Apr 9;12(8):1279. doi: 10.3390/nano12081279.
Multilevel anticounterfeiting Physical Unclonable Function (PUF) tags based on thin film of silver (Ag), Zinc Oxide (ZnO) and PolyVinylPyrrolidone (PVP), are experimentally demonstrated and validated. We exploit the low adhesion of silver to glass and consequent degradation during ZnO deposition to induce morphological randomness. Several photographs of the tag surfaces have been collected with different illumination conditions and using two smartphones of diverse brand. The photos were analyzed using an image recognition algorithm revealing low common minutiae for different tags. Moreover, the optical response reveals peculiar spectra due to labels of plasmonic nature. The proposed systems can be easily fabricated on large areas and represent a cost-effective solution for practical protection of objects.
基于银（Ag）、氧化锌（ZnO）和聚乙烯吡咯烷酮（PVP）薄膜的多级防伪物理不可克隆功能（PUF）标签已通过实验得到演示和验证。我们利用银与玻璃的低附着力以及在氧化锌沉积过程中随之而来的降解来诱导形态随机性。在不同光照条件下，使用两款不同品牌的智能手机收集了标签表面的多张照片。使用图像识别算法对照片进行分析，结果显示不同标签的共同细节特征较少。此外，光学响应揭示了由于等离子体性质的标记而产生的独特光谱。所提出的系统可以很容易地在大面积上制造，并且是一种用于物体实际保护的经济高效的解决方案。
