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What is RFID? 

Updated: Dec 16, 2022

In recent years, Hong Kong citizens have been required to replace their smart ID cards, the awareness of personal data protection, especially the rapid development of electronic technology, has been highly discussed shortly.


RFID is the abbreviation of Radio Frequency Identification, which is a kind of magnetic technology. When the radio passes by, the information stored in the object will be sent to the computer system to read the information. In daily life, Octopus, Visa, PayWave, Master PayPass, the clothing tags of Uniqlo are also using this technology. In addition, some companies also use RFID to manage goods in large warehouses.


Potential concerns of RFID

Although RFID is very simple to use, it also has some potential network security concerns. In the early stage, RFID did not use a lot of encryption technology, so people worried that their personal information such as credit card information is easy to expose. Therefore, many technologies have been derived to block RFID information and protect personal data after that.


The most common anti-RFID signal products in the current market are anti-RFID cardholders, anti-RFID wallets, and tin foil. In fact, as long as they are used correctly and completely, those products can effectively block RFID signals.


In fact, obsessive worries about personal information being easily stolen are not needed. The Octopus and credit cards that are commonly used nowadays apply Near-field Communication (NFC), which is a short-distance high-frequency Wireless communication technology that is an extension of RFID technology. The use range of NFC is limited to 10 cm to 4 inches, and the required applications must be downloaded before use., NFC is a highly secured RFID technology, payment tools such as Octopus, Visa PayWave, and MasterCard PayPass also apply to NFC.

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