Physical Unclonable Anti-Counterfeiting “Watermarks” Via Swelling-Induced Buckling-Delamination in Polymer Bilayers for Portable and Robust Authentication

IF 19 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Liangzheng Du, Haoran Zhang, Chuanxing Wang, Kunlai Zhang, Haoyi Zhang, Jisong Yang, Chen Wu, Zirui Fan, Lei Pan
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引用次数: 0

Abstract

Conventional anti-counterfeiting labels, primarily fabricated through deterministic processes, are inherently vulnerable to sophisticated counterfeiting attacks. Physical unclonable functions (PUFs), leveraging intrinsic non-deterministic characteristics, have emerged as a promising hardware-based solution for high-security applications. This work presents a novel anti-counterfeiting label that bridges the time-honored watermarking concept with cutting-edge PUF technology. By harnessing surface buckling-delamination instabilities via a facile one-step water-swelling approach on poly(vinyl alcohol)/polydimethylsiloxane (PVA/PDMS) bilayers, millimeter-scale PUF watermarks are fabricated that mimic natural leaf vein morphologies. These watermarks exhibit critical attributes including randomness, irreversibility, uniqueness, and irreproducibility, which are fundamental to anti-counterfeiting efficacy. Additionally, they offer tunable control over pattern dimensions, shapes, and encoding capacities, accommodating diverse security level requirements. Furthermore, the watermarks exhibit fingerprint-like minutiae and compatibility with computer-vision-based feature-matching algorithms, enabling accurate and efficient authentication/identification using portable devices (e.g., smartphones and flatbed scanners) without relying on costly instrumentation. Moreover, the encapsulated watermark patterns demonstrate excellent durability under rigorous tests, such as UV irradiation, water immersion, and high-temperature exposure, validating their superior environmental adaptability. Notably, this transparent and flexible label can be easily integrated onto various real-world objects without compromising their visual appearance and normal use.

Abstract Image

物理不可克隆的防伪“水印”:基于聚合物双层膨胀诱导屈曲分层的便携式鲁棒认证
传统的防伪标签主要是通过确定性过程制造的,天生就容易受到复杂的伪造攻击。物理不可克隆功能(puf)利用固有的不确定性特征,已经成为一种有前途的基于硬件的高安全性应用程序解决方案。这项工作提出了一种新颖的防伪标签,将历史悠久的水印概念与尖端的PUF技术相结合。通过在聚乙烯醇/聚二甲基硅氧烷(PVA/PDMS)双层上采用简单的一步水膨胀方法,利用表面屈曲-分层不稳定性,可以制造出毫米级的PUF水印,模拟天然叶静脉形态。这些水印具有随机性、不可逆性、唯一性和不可复制性等关键属性,是防伪效果的基础。此外,它们提供对模式维度、形状和编码能力的可调控制,以适应不同的安全级别需求。此外,水印表现出类似指纹的细节,并与基于计算机视觉的特征匹配算法兼容,可以使用便携式设备(例如智能手机和平板扫描仪)进行准确有效的身份验证/识别,而无需依赖昂贵的仪器。此外,封装的水印图案在严格的测试中表现出优异的耐久性,例如紫外线照射,水浸泡和高温暴露,验证了其优越的环境适应性。值得注意的是,这种透明和灵活的标签可以很容易地集成到各种现实世界的物体上,而不会影响它们的视觉外观和正常使用。
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来源期刊
Advanced Functional Materials
Advanced Functional Materials 工程技术-材料科学:综合
CiteScore
29.50
自引率
4.20%
发文量
2086
审稿时长
2.1 months
期刊介绍: Firmly established as a top-tier materials science journal, Advanced Functional Materials reports breakthrough research in all aspects of materials science, including nanotechnology, chemistry, physics, and biology every week. Advanced Functional Materials is known for its rapid and fair peer review, quality content, and high impact, making it the first choice of the international materials science community.
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