[Internet Citizen] What Is NFC?

Have you ever made a contactless payment or used a bus ticket simply by holding it near a turnstile? If so, you have already used NFC, a technology that's becoming increasingly common in our everyday life. NFC (Near Field Communication) uses the principles of electromagnetic induction and radio frequency to allow two nearby wireless devices to exchange information, usually at a distance of up to 4 cm. This is how it works: a powered device (such as a card reader) emits radio waves that activate the receiving device (for example, a credit card), allowing the transmission of data. The machine then decodes this information and completes the desired action, such as approving a payment. But NFC is not limited to contactless payments. This technology can be used for a variety of purposes, including public transportation tickets, digital door keys, access badges, and file sharing between cell phones. All this without the need for cables, passwords, or complicated configurations! Despite being a very practical and widely adopted technology, NFC requires caution. When it's enabled, any compatible device can try to communicate, creating opportunities for malicious individuals to obtain data or conduct financial transactions. To stay protected while using NFC, some measures are essential: keep NFC turned off when you're not using the feature; protect your devices with passwords or biometric authentication, such as fingerprint or facial recognition. For contactless cards, try to use cases or wallets that block radiofrequency. Check out the video Be Careful with Your Contactless Cards to learn more! With the right precautions, NFC can be a practical, fast, and secure tool that simplifies many of your daily tasks.