A two-dimensional barcode made of black and white squares that stores information such as a web link or payment details for quick scanning.
QR stands for quick response. The format was invented in 1994 by Denso Wave, a Japanese company, to track automotive parts. Unlike traditional barcodes that hold data in one direction, QR codes store data both horizontally and vertically and include error correction, so they can still be read if partly damaged.
Smartphone cameras can scan QR codes instantly, which made them popular for restaurant menus, event tickets, Wi-Fi sharing, product information, and especially payments. In several countries, merchant QR codes linked to systems like UPI are a common way to pay at small shops. A security concern is quishing, where attackers place fake QR codes that lead to phishing sites, so it is wise to check the link before entering details.
An app or phone feature that stores payment cards, bank links, or balances so users can pay with their phone.
Near Field CommunicationA short-range wireless technology, known as NFC, that lets devices exchange data when held a few centimetres apart.
PhishingA social engineering attack that uses fake emails, messages, or websites to trick people into revealing information or installing malware.
QR Code MenuA restaurant menu customers open on their own phones by scanning a QR code at the table, instead of using a printed menu.
Unified Payments InterfaceIndia's real-time payment system that lets users instantly transfer money between bank accounts using a mobile phone.
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