lähitietoliikenteellä

Lähitietoliikenne, often translated as "near-field communication" or NFC, is a set of communication protocols that enables two electronic devices to establish a radio connection within a short distance, typically a few centimeters. This technology operates on a radio frequency of 13.56 MHz. NFC devices can function in two main modes: active and passive. Active devices can generate their own radio frequency field and communicate with passive devices, which can be powered by the field generated by an active device.

NFC enables a range of applications, including contactless payments, where a smartphone or card can be tapped against a payment terminal. It is also used for pairing devices, such as Bluetooth speakers or headphones, by simply bringing them close together. Access control systems, like electronic key cards or hotel room entry, commonly utilize NFC. Furthermore, NFC tags, small passive devices, can store information and be read by an NFC-enabled device. These tags can be used for various purposes, such as providing information about a product, launching an application, or automating a task on a smartphone.

The security of NFC communication is achieved through several mechanisms. Data is typically encrypted, and the short communication range inherently limits eavesdropping opportunities. However, like any wireless technology, vulnerabilities can exist, and users are advised to be aware of their surroundings and the devices they interact with. NFC technology is increasingly integrated into everyday devices, offering convenient and secure ways to interact with the digital and physical world.