Google to Introduce QR Codes for Gmail 2FA Amid Rising Security Concerns

Google is set to introduce QR codes as a replacement for SMS-based two-factor authentication (2FA) codes for Gmail users in the coming months. While this security update aims to improve authentication methods, it also raises concerns, as QR code-related scams have been increasing. Even Google’s own threat intelligence team and law enforcement agencies have warned about the risks associated with malicious QR codes.

QR codes, short for Quick Response codes, were originally developed in 1994 for the Japanese automotive industry. Unlike traditional barcodes, QR codes store data in both horizontal and vertical directions, allowing them to hold more information. 

A QR code consists of several components, including finder patterns in three corners that help scanners properly align the code. The black and white squares encode data in binary format, while error correction codes ensure scanning remains possible even if part of the code is damaged. When scanned, the embedded data—often a URL—is extracted and displayed to the user.

However, the ability to store and quickly access URLs makes QR codes an attractive tool for cybercriminals. Research from Cisco Talos in November 2024 found that 60% of emails containing QR codes were spam, and many included phishing links. While some emails use QR codes for legitimate purposes, such as event registrations, others trick users into revealing sensitive information. 

According to Cisco Talos researcher Jaeson Schultz, phishing attacks often use QR codes for fraudulent multi-factor authentica

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