Abstract

The use of Quick Response (QR) code [1] has proliferated with growing number of mobile consumers and its use in a wide range of applications including advertisement, product labelling and tracking, access control, and mobile payments etc. However, being a static image, a QR code can be replicated or altered easily posing a security challenge while using it for sensitive applications, for instance, payments and access control. Visible light communication (VLC) or Li-Fi, which uses modulated LED light to transmit data that can be captured via the CMOS image sensor on a smartphone [2], presents an ideal opportunity to substitute traditional static QR code with an LED light based QR code. This type of light based QR code (LiQR) is se-cure and can be dynamically programmed for improved security as well as cover a wider range of applications.

© 2017 Japan Society of Applied Physics, Optical Society of America