In daily life, people who carry wallets with them often carry bank cards, credit cards, and transportation cards in their bags. Recently, many cities have launched the use of bank card UnionPay flash payment services to take subways and buses, greatly facilitating people’s travel. At the same time, people are increasingly using NFC functions on their phones to swipe through subway gates and take public transportation. A mobile phone with NFC function can read bank card transaction information up close, exposing the cardholder’s personal financial information and potentially causing theft and fraud. Moreover, the large number of people on buses and subways can easily cause overcrowding, which provides a great possibility for personal bank card information theft.
How do we prevent bank cards and other cards from being stolen and swiped? There are RFID anti-theft card sleeves and other products available on the market, but RFID anti-theft card sleeves can only be used for one card per set. If there are multiple cards, multiple card sleeves need to be used accordingly, which not only increases the thickness of the wallet, but also makes it difficult to use. When using, the cards need to be taken out of the card sleeves and then put back. Therefore, there is another very simple method, which is to block the wallet with RFID.
What is RFID blocking? Radio Frequency Identification (RFID) is a wireless communication technology that can identify specific targets and read and write relevant data through wireless signals, without establishing mechanical or optical contact between the identification system and specific targets. The radio signal is transmitted from the tag attached to the item through an electromagnetic field tuned to radio frequency, in order to automatically identify and track the item. For example, the RFID chip in a credit card contains the information required for authorized transactions, while the RFID chip in an access card has a code to open the door or restrict the system. However, conductive metals can reflect, absorb, and cancel electromagnetic waves, so RFID signal shielding fabrics draw on this principle. The main function is to suppress the interference of external magnetic fields and ensure the normal operation of internal chips; Reduce the magnetic field intensity within the protected area to avoid the impact of heat generated by external magnetic fields on the internal chip.
How does RFID blocking of wallets work? The working principle of RFID chips is to use radio waves for communication. Taking credit cards as an example, there is an embedded RFID tag with information inside the card. Banks or consumer places only need to use RFID readers to read the information on the tag through radio waves. The key is that RFID chips have tiny electromagnetic waves, which allow them to read without the need to “start” communication, so RFID readers only need to be close enough to read the cardholder’s identity information. Fortunately, wireless waves are also easily blocked, which is the working principle of RFID blocking wallets. Simply place the credit card in a material that can interfere with radio waves, and it can block all electromagnetic waves, thereby preventing communication between the card and the RFID reader.
Is RFID protected wallet worth purchasing and using? Of course, the concept behind RFID blocking cards is reliable. As credit card holders, the card contains a lot of our information, and if this information is stolen, the consequences will be unimaginable. If it is a “high-value” target audience, such as IC card bank employees who have access to valuable or sensitive assets, it is necessary to use RFID to block card holders or wallets. An RFID blocked wallet is worth purchasing and using, even if the probability of information theft is very low in the current environment. At the same time, RFID shielded wallets can also be exquisitely crafted, customized according to their preferred styles, and can be used normally as regular wallets. So why not use them?
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