methods rely on clonable labels produced by a deterministic process. These labels are low-cost but their simple and repeatable preparation processes and regular decoding mechanisms are exploitable by counterfeiters. [4,5] Many of the more complex and safer anti-counterfeiting labels (such as high-end RFID labels with large number of logic gates) cannot become standard on some commonly used products due to their high cost. [5,6] Anti-counterfeiting labels with physical unclonable functions (PUF) are a feasible solution to the above shortcomings. Since the introduction of the PUF in 2002, [7] many anticounterfeiting labels with different PUF characteristics have been developed, such as unique bionic fingerprint pattern with random surface topography; [8][9][10] randomly distributed nanoparticle pattern, including flower-like patterns with random pinning points, [11] nanowires coated with fluorescent dyes in random positions, [12] etc. In addition, researchers have prepared many types of PUF anticounterfeiting labels with optical response. For example, Cheng et al. [13] reported a multicolor plasma nanopaper with random Raman intensity distribution, He et al. [14] designed multi-mode structural-color anti-counterfeiting labels composed of randomly arranged nanospheres, and Leem et al. [15] developed edible silk film labels with random light response. To improve the capabilities and speed of unclonable-pattern recognition,

Photodetectors with long detection distances and fast response are important media in constructing a non-contact human–machine interface for the Masterly Internet of Things (MIT). All-inorganic perovskites have excellent optoelectronic performance with high moisture and oxygen resistance, making them one of the promising candidates for high-performance photodetectors, but a simple, low-cost and reliable fabrication technology is urgently needed. Here, a dual-function laser etching method is developed to complete both the lyophilic split-ring structure and electrode patterning. This novel split-ring structure can capture the perovskite precursor droplet efficiently and achieve the uniform and compact deposition of CsPbBr3 films. Furthermore, our devices based on laterally conducting split-ring structured photodetectors possess outstanding performance, including the maximum responsivity of 1.44 × 105 mA W−1, a response time of 150 μs in 1.5 kHz and one-unit area < 4 × 10–2 mm2. Based on these split-ring photodetector arrays, we realized three-dimensional gesture detection with up to 100 mm distance detection and up to 600 mm s−1 speed detection, for low-cost, integrative, and non-contact human–machine interfaces. Finally, we applied this MIT to wearable and flexible digital gesture recognition watch panel, safe and comfortable central controller integrated on the car screen, and remote control of the robot, demonstrating the broad potential applications.

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