A startup called Lisnr wants to replace NFC and QR codes with a new technology that sends data over audio — a communication protocol it’s calling Smart Tone. The technology it’s invented can be used ...

QR codes — or "Quick Response" codes — are square-shaped barcodes that can be scanned by mobile devices. They are used for a variety of applications, from pulling up a restaurant menu to directing ...

On Tuesday, a Reddit user named "nhciao" posted a series of artistic QR codes created using the Stable Diffusion AI image-synthesis model that can still be read as functional QR codes by smartphone ...