The codes are designed to hold a relatively large amount of data in a small space — just under three kilobytes of binary data, or more than 4,000 letters and numbers.

Customers wary of data collected by QR codes By YANG ZEKUN | CHINA DAILY | Updated: 2024-03-16 06:59 ...

Japanese engineer Masahiro Hara, known for inventing the ubiquitous 'QR code' nearly 30 years ago, announced on Friday that he is now working on a new version of the popular tracking system.

Two-dimensional matrix bar codes are expanding into the mainstream. You can find them in magazine and newspaper ads and in stores including Best Buy, Lowe's, Gap and Macy's. They're even showing ...

"This QR code system is secure because it complies with the Personal Data Protection Act 2010 (Act 709), and we have implemented appropriate measures,” he said. "The data is used solely for ...