a statue is a permanent installation right? how do they prevent one guy scanning it and sharing the URL(?) to everyone?
or just bookmark the url and open it again next day without scanning the statue again.
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I assume it goes to a URL which is only valid between noon and 1pm. The QR code is probably scannable during a time period slightly wider than that, depending on the time of year.
It looks like the QR "statue" pivots to correct for the changing path of the sun across the sky, but the positioning doesn't have to be accurate to the point of working exactly from 12:00:00 to 13:00:00 local time. You can also add enforcement on the web server.
You can actually just play the video on the linked article, pause it at the right time, and point your phone at the screen. If I could read Korean I might be able to tell if the site has a time-lock of some kind.
This isn't really about being secure - it's about clever marketing. And it definitely succeeds at that.
Maybe they'd like for one guy to share the URL with everyone.
Yeah - I guess this is more of a customer attraction and branding scheme than foolproof.
Tech-minded guys think of all these issues. It is a brilliant marketing idea! I would scan the QR code.