**What is a QR Code?**
QR Code (Quick Response Code) is a type of matrix barcode that can store significantly more data than traditional barcodes. These two-dimensional codes can contain information such as URLs, text, phone numbers, and even payment information.
QR Codes allow for faster scanning and reading of information using devices like barcode scanners or cameras with dedicated apps.
**How are QR Codes used in mobile payment apps?**
Mobile payment apps like MoMo, ZaloPay, and VnPay have widely adopted QR Codes for seamless transactions. When making a purchase, users simply open the app, scan the QR Code at the checkout counter, and confirm the transaction without entering a password.
**Why don’t supermarket QR Code scanners require a password for payments?**
When paying at a supermarket with a QR Code, customers are usually prompted to enter their password. However, if the merchant uses a scanning device to scan the customer’s QR Code, no password is required. This is because the customer has already set up a payment account within the app, and the displayed QR Code contains all the necessary information for the transaction.
The process involves the scanning device communicating with the cashier’s computer. When the QR Code is scanned, the corresponding amount is directly deducted from the customer’s account, based on the value of the goods purchased.
The convenience of password-free payments is made possible by complex technical and security measures.
This level of convenience is the result of intricate technical and security measures. While it enhances the user experience and promotes modern payment methods, it is crucial for users to maintain security protocols to safeguard their finances.
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