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• W4280497056 abstract "Benefiting from the development of the Internet and smart devices, it is now convenient to transmit images anywhere and anytime, which poses a new challenge for image security. The Visual Cryptography Scheme (VCS) is a secret sharing method for protecting an image without a key, the merit of VCS is the human visual system (HVS) can restore the secret image by simply superimposing qualified shares, without any computation. To eliminate noise-like shares in traditional VCS, this paper presents a novel QR code-based expansion-free and meaningful visual cryptography scheme (QEVCS), which generates visually appealing QR codes for transmitting meaningful shares. When distributing on public networks, this scheme does not attract the attention of potential attackers. By limiting the gray-level of a halftoned image, QEVCS both keep the computation-free of visual cryptography and the size of recovery image same as the secret images. The experimental results show the effectiveness of QEVCS when preserving the privacy of images." @default.
• W4280497056 created "2022-05-22" @default.
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• W4280497056 date "2022-05-10" @default.
• W4280497056 modified "2023-10-14" @default.
• W4280497056 title "A QR code-based user-friendly visual cryptography scheme" @default.
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• W4280497056 doi "https://doi.org/10.1038/s41598-022-11871-9" @default.
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