An RFID card (Radio Frequency Identification) is a card equipped with an electronic chip and an antenna that enables short-range wireless data transmission. It operates using radio-frequency identification technology, which makes it possible to read or write information stored on the chip without direct physical contact. RFID cards are widely used in access-control systems, work-time management, public transportation, logistics and goods traceability. They come in several formats: badge, plastic card, key fob or self-adhesive tag.
The operating principle is based on an exchange of information between the RFID card and a compatible reader. When a card is brought near a reader, the reader sends a radio signal that powers the card’s chip. The chip then transmits the stored data (unique identifier, access information, etc.) to the reader, allowing the requested action to be validated or denied. RFID cards can be passive (battery-less, activated by the reader’s signal) or active (powered by an integrated battery for a longer range).
In the context of work-time management, RFID cards are often integrated into electronic time-clock systems or digital timesheets. They allow:
They can also be paired with staff geolocation systems for better field-team management.
The RFID card does not require physical contact with a reader, whereas a magnetic-stripe card has to be swiped. In addition, RFID is generally faster, more reliable and more resistant to wear.
Yes, certain RFID cards, particularly low-frequency or unencrypted models, can be vulnerable to cloning. Using encrypted, secure RFID cards is recommended for sensitive environments.
The range depends on the type of card. Passive cards have a range of a few centimeters to a few meters, while active cards can reach several dozen meters.
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