What is RFID blocker: How It Works & Why You Need It
Almost every credit or debit card, as well as many mobile phones, now include radio frequency identification (RFID) technology. This enables contactless payments, allowing users to simply wave their bank card, ID, or phone over a reader. The device then scans the information and processes the transaction instantly.
This technology has made many transactions faster and more convenient for both businesses and consumers. RFID chips are also widely used for speeding up toll payments, tracking livestock on large farms, and processing visa information for international travelers.
However, RFID technology has also led to security concerns. Since it continuously transmits sensitive data, it is vulnerable to a new form of hacking known as contactless crime. This is especially concerning for consumers who appreciate the convenience of RFID but do not want to risk exposing their bank details, personal identification, or other private information to potential threats.
To address this issue, RFID blockers, such as specially designed wallets and cardholders, have been developed. These products claim to prevent unauthorized scanning and protect users from digital theft. But the question remains—are RFID blocking devices truly effective, and are they worth the investment?
What is RFID?
RFID stands for Radio Frequency Identification, a technology that enables machines to read signals from RFID chips embedded in packages, passports, credit cards, and other smart devices. While RFID has become an essential part of modern contactless payments and asset management, it has also raised concerns about security risks and potential misuse by cybercriminals. As a result, many consumers are now turning to RFID blockers as a protective measure against unauthorized scanning and data theft.
What is RFID blocking?
RFID blocking makes your RFID-enabled device safe from unauthorized access. The most common way to protect your cards is to use an RFID blocker wallet—a cardholder made from materials that disturb electromagnetic fields.
RFID blocking technology was created to stop criminals from using unauthorized contactless scanning. In simple terms, a thief standing nearby could secretly access your card’s RFID feature in what is known as a “skimming” attack, stealing money from victims on the street, in a busy bus, or while waiting in line at the grocery store.
Does RFID blocker work?
The simplest way for consumers to block RFID signals is by making a wallet, purse, or bag from aluminum foil and securing it with tape. This method stops the radio signals between your cards or important documents and any potential hackers trying to steal your information. However, these solutions are neither attractive nor convenient.
Materials that block RFID signals, like aluminum foil, can help prevent scanning in skimming attacks or similar hacks. RFID encoding works by creating magnetized patterns that can be read when they are unshielded. Many new products now combine carbon fiber and aluminum in a stylish case to protect your documents and bank cards from theft, acting as an effective RFID blocker.
RFID technology uses magnetization to store important information on a card, piece of paper, security door opener, or another device you might use. Early versions of RFID used copper wire coils to open security doors. Modern RFID is much more advanced, but it still works on the same basic idea.
Although it is possible to copy these magnetized patterns, the process has always been complex and slow. Modern RFID chips do not send out a radio frequency like a radio station broadcasts, so your information is not spread all over the world. Instead, the signal is weak and stops close to your card, booklet, passport, or other device, making it hard for an antenna and decoding program to capture your data.
Do you need RFID blocker technology?
While contactless crime and skimming attacks are becoming more common and advanced, current RFID technology does not send your information far. This makes it much harder for criminals to steal your data unless your bank cards or ID have already been taken.
In 2018, RFID skimming attacks were very rare because a criminal needed to be very close to you to capture your information. A report from the United Kingdom that year showed no evidence that someone could use contactless theft to steal data from a card without also taking the card itself. Therefore, a person with a scanner cannot simply walk by and instantly grab your data, since RFID signals do not travel far from the chip.
If a criminal does steal your bank card or another document, they could use a scanner to access some personal details from the RFID chip. Some YouTube videos show that advanced scanners can read a bank card and extract important information, which is one way identity theft might happen. However, even the best RFID blocker wallet cannot stop this process if a thief takes your whole wallet, purse, or bag, because then they can use their scanner on the entire item.
How to manage RFID information & prevent identity theft
RFID blocking can give you some peace of mind, but it might not stop a thief from stealing your money or personal details if they take your documents. Many items like bank cards or passports that use RFID also have extra security features to prevent skimming. For example:
- Credit and many debit cards use a one-time transaction code that is strongly encrypted to finish a payment.
- The data on your bank cards that can be scanned does not include extra personal details, such as the security code on the back, which makes it less attractive to criminals.
- Government documents like passports have special encryption that is much harder to break without approved scanners.
- Passports also come with several layers of RFID blocking material, leaving only a small area for approved scanning, which makes it tougher for thieves to copy your data.
For a criminal to steal your information, they must stand very close to you for a long enough time to capture your bank or passport details—and this close contact is usually noticeable. Then, they would need to decode the little bit of information they got, which takes time. Finally, they would have to figure out how to use this incomplete data, which is not enough to quickly access your social security number, bank account, health benefits, or other private information.
Even though skimming crimes might increase as more people use contactless payments and similar methods, these crimes are still hard to pull off and do not give a fast reward. In fact, security experts note that it is much easier to buy stolen identity information from the dark web to get access to credit or bank accounts.
Instead of buying a novelty wallet or purse, you should check the security features on your documents or bank cards to understand how companies are protecting you with the latest technology. For businesses worried that skimming attacks might steal customer information, there are specific encryption and security methods available. In addition, using an RFID blocker can add extra protection to your personal items.
Global-Leading RFID Solution for Cybersecurity and Information Security
With the third-generation RFID reader chip developed, NATIONRFID’s product features globally leading technology and is built using the world’s most advanced manufacturing process and low-power circuit technology. Its main advantages include enhanced cancellation performance (making it suitable for antennas with poorer VSWR), an optimized low-noise frequency synthesizer (PLL), and refined baseband signal processing algorithms. These benefits make it ideal for high-performance applications in retail, logistics, industrial production lines, smart transportation, and more.
Our RFID products can directly encrypt data and prevent copying. They fully ensure data security by stopping malicious forgery and data leakage.
