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The holy temple of QR
A password on a QR code guards the short link, not the page behind it. We decoded the code image, read the locked page, fired wrong passwords and opened the page directly.
A QR code can hold up to 7,089 digits. A web address needs a different encoding. We used 15,888 simulated images to test how much a 2, 3, 5 or 10 cm code can hold and still scan at different distances.
A one-eyed QR code that holds 35 digits and that most phones cannot scan. What a Micro QR code is, the real size math, and what to print when space is tiny.
2027 is coming, but only one EU law actually mandates a QR code. The honest map of what is law, what is voluntary, and what it costs a small brand.
ChatGPT can encode a link in a QR code. Here's what to ask for, how to test the file, and when to use a dynamic code so you can change the link after printing.
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