China uses a traffic-light system on a COVID app to let people know if they can enter public venues. People who recently tried to attend a protest fear the app is being used to monitor and target them ...

The EU and the UK are rolling out QR codes that allow people to travel again during the pandemic. The systems both involve Chinese-style encoding of personal information into scannable codes. Insider ...

A Chinese subway system’s attempt to spread some Lunar New Year cheer backfired over the weekend, as panicked passengers mistook seasonal red QR codes for positive Covid tests. Chinese social media ...

Chinese President Xi Jinping is pushing for a global Covid-19 tracking system using QR codes, to help fast-track international travel and business during the coronavirus pandemic. China mandated the ...

A QR code, or Quick Response code, allows users to scan it with a smartphone camera and be directed to any online destination. These square grids of pixels are commonly used to view a menu, add ...