For those who don’t know, it’s where someone takes a QR code like on a poster for a concert and puts a sticker with a different QR code on top to a fake website that looks like the concert website (or a Rick Roll).
The obvious answer is to scratch off the QR code if you notice it’s a sticker, but It’s not always acceptable -or legal- to start damaging stuff to check if it’s real or not. Also what if it’s out of reach on a sign or something?
You can’t put a little text under saying what the website is as a sort of checksum because the vandal can just write their own website under their sticker.
Interesting! I did not realize they use bit.ly and such. That would make the solution even more difficult, as Apple and Google would then need to make some sort of deal with every major URL shortening service to somehow be able find out what the URL links to, and then check it against a blocklist. That would require quite a bit of cooperation, to the point of being a non-starter I’d think. Why use a short URL service for a QR code?