Users would think that they are scanning the QR code of a trusted company, but it leads them to malicious content. There are no security flaws however, replacing the QR code with another is possible. Then the QR code minimum size will be 0.8 inches. And if the scanning distance is 0.5 feet or maybe 6 inches. Usually, a dynamic vCard QR code has about 33 rows and columns of data.
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