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Normal QR Code Versus Signed/Verifiable QR Code
You have likely seen a lot more QR codes over the last two years due to the pandemic. At many restaurants, for example, which are keen not to share physical menus, customers scan a QR code with their phone camera to open a website for the online menu.
- Short for Quick Response, a QR code stores all kinds of information that can be scanned and accessed by a digital device such as your smartphone.
- The machine-readable format can also be printed on a piece of paper.
- While barcodes are one-dimensional, which means that information can be scanned only horizontally, QR codes are two-dimensional. Hence, information on a QR code can be read both horizontally and vertically, allowing it to store more data.
- QR codes allow you to download applications, join WiFi networks without having to key in any password, scan coupons, and much more. They can be embedded on a company’s website to gather feedback, facilitate registrations, collect customer data, and order details. QR codes can be used on physical products as a way to provide more information.
- QR codes are also used for document verification to check if a credential is genuine. This has gained popularity during the pandemic with some countries opting for QR code-based vaccination certificates to open up travel and business.