Gandla Srinivas, Yoon Jinsik, Yang Cheol-Woong, Lee HyungJune, Park Wook, Kim Sunkook
Multifunctional Nano Bio Electronics Lab, Department of Advanced Materials Science and Engineering, Sungkyunkwan University, Cheoncheon-dong, Jangan-gu, Suwon-si, Gyeonggi-do, 16419, Republic of Korea.
Institute for Wearable Convergence Electronics, Department of Electronics and Information Convergence Engineering, Kyung Hee University, Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 17104, Republic of Korea.
Nat Commun. 2024 Aug 31;15(1):7592. doi: 10.1038/s41467-024-51756-1.
Anticounterfeiting tags affixed to products offer a practical solution to combat counterfeiting. To be effective, these tags must be economical, capable of ultrafast production, mass-producible, easy to authenticate, and automatable. We present a universal laser ablation technique that rapidly generates intrinsic, randomly distributed craters (in under a second) on laser-sensitive materials using a nanosecond pulsed infrared laser. The laser and scanning line parameters are balanced to produce randomly distributed craters. The tag patterns demonstrate high randomness, which is analyzed using pattern recognition algorithms and root mean square error deviation. The optical image information of the tag is digitized with a fixed bit uniformity of 0.5 without employing any debiasing algorithm. The efficacy of tags for anticounterfeiting is presented by securing the challenge associated with each tag. Statistical NIST tests are successfully performed on responses generated from both single and multiple tags, demonstrating the true randomness of the sequence of binary digits. The single(multiple) tag(s) achieved an actual encoding capacity of approximately 10 (10) and a low false rate (both positive and negative) on the order of 10 (10). Our findings introduce a laser-based method for anticounterfeiting tag generation, allowing for ultrafast and straightforward product processing with minimal fabrication and tag cost.
贴在产品上的防伪标签为打击假冒伪劣提供了一种切实可行的解决方案。为了有效，这些标签必须经济实惠、能够超快生产、可大规模生产、易于认证且可自动化。我们提出了一种通用的激光烧蚀技术，该技术使用纳秒脉冲红外激光在激光敏感材料上快速（在一秒内）产生内在的、随机分布的凹坑。平衡激光和扫描线参数以产生随机分布的凹坑。标签图案显示出高度的随机性，使用模式识别算法和均方根误差偏差进行分析。标签的光学图像信息以0.5的固定比特均匀性进行数字化，无需使用任何去偏算法。通过确保与每个标签相关的挑战性来展示标签的防伪功效。对单个和多个标签产生的响应成功进行了统计NIST测试，证明了二进制数字序列的真正随机性。单个（多个）标签实现了约10（10）的实际编码容量和10（10）量级的低错误率（正负）。我们的研究结果引入了一种基于激光的防伪标签生成方法，允许以超快且直接的方式进行产品加工，同时将制造和标签成本降至最低。
