How QR codes work and how to use them safely
A QR code is a two-dimensional pattern that encodes data with error correction. A camera or scanner reads the modules, reconstructs the payload and presents an action such…
Ця стаття пояснює тему простими словами: Treat a QR code like a link you cannot read until the scanner reveals it. Практичний підхід полягає в тому, щоб перевірити контекст, оцінити ризики та діяти поступово.
A QR code is a two-dimensional pattern that encodes data with error correction. A camera or scanner reads the modules, reconstructs the payload and presents an action such as opening a URL, composing a message or adding a contact.
How it works
The visual pattern does not prove that the destination is safe. A sticker can cover a legitimate code, and a shortened URL can hide the final domain. The phone may also carry out an action more quickly than a person can inspect it.
Practical takeaways
Preview the URL before opening it, check the domain spelling and avoid entering passwords or payment details after scanning an unexpected code. Businesses should put the destination in visible text as well.
QR codes are a convenient transport format, not a trust signal.
In short: Treat a QR code like a link you cannot read until the scanner reveals it.