https://positive-intentions.com/blog/qr-codes-as-a data-channel
QR Codes as a Data Channel
the demo in the blog article is a bit cluncky. here is a better link for it: https://chat.positive-intentions.com/#/qr
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some ‘practical’ uses could be a fun kind of scavenger hunt IRL or on a website or group of web sites. It could be used as a kind of dead-drop medium. piece some together as a key to decrypt something. Go even more cloak and dagger with some element of steganography.
Sounds like a really good idea!
Interesting idea!
