(TNS) — During the COVID-19 pandemic, people have become accustomed to using their smartphone cameras to scan small black-and-white square bar codes, allowing them instantly to do everything from ...

Among the many changes brought about by the pandemic is the widespread use of QR codes, graphical representations of digital data that can be printed and later scanned by a smartphone or other device.

QR codes are a type of barcode, or scannable pattern, that contain various forms of data, like website links, account information, phone numbers, or even coupons. QR codes are found everywhere from ...