Is RFID blocking necessary?

Convenience often comes at a cost, and there’s no better example of that than our modern contactless cards and digital wallets. While tapping to pay has made everyday purchases seamless, it has also opened the door to various unauthorized scans and data-theft schemes.

Naturally, a question pops up: "Is RFID blocking really necessary today, or is it merely another marketing gimmick?"

To answer that, the Cybernews research team and I have dug into the subject, diving much deeper than mere manufacturer claims. We've thoroughly reviewed any data we could get our hands on, from expert opinions to online forum discussions, to determine whether RFID-blocking products actually work.

Below are our findings, along with a simple breakdown of the technology, the most effective materials, and the pros and cons of different RFID-blocking products.

What is RFID blocking?

RFID, short for radio frequency identification, is a widely used wireless communication system. The simple two-component setup, typically consisting of microchip-enabled tags and readers that scan them, has found its way into various other systems. Today, it’s in everything from bank cards and passports to access cards, key fobs, and electronic toll systems on highways.

However, its simplicity is also its greatest drawback. After all, just about any scammer with a skimming device can scan these RFID-enabled cards, documents, and gadgets.

This brings us to RFID blocking, which refers to the use of specific materials that prevent unauthorized scanning of RFID tags. These can either line wallets and bags or be put inside specialized RFID-blocking cards. As such, they protect users from scammers who can easily tap your pocket with a skimmer and create a bogus charge or steal your personal data.

How does RFID blocking work?

In an RFID system, the reader’s electromagnetic field powers the passive tag, which then transmits the information from its microchip back to the reader. Alternatively, the reader can emit radio waves that get picked up by an active RFID tag, which, again, does the same thing. As you can imagine, this also makes it easy for skimmers to get that info.

That’s precisely where RFID-blocking wallets, bags, cards, and other devices come in. Some of them shield your RFID-enabled cards and documents with materials that block all radio signals. Others act more like jammers, emitting their own counter-signal that interferes with those coming from skimmers.

In any case, these simple, passive devices can neutralize skimming threats, protecting your RFID-enabled gadgets.

What are the different RFID-blocking materials?

Fortunately, RFID signals can be absorbed, reflected, or entirely blocked by certain materials. Here are the most common ones used for such purposes:

• Aluminum foil. As one of the lightest metals around, aluminum works wonders for reflecting RFID signals. That said, it’s not the most durable option, especially in foil form.
• Copper or nickel-infused fabric. Both of these metals are highly conductive and durable, making them an easy choice for incorporation in various fabrics.
• Carbon fiber layers. Often used in extreme engineering, carbon fiber is both lightweight and strong, so it’s also an excellent choice for RFID-blocking gadgets.
• Metal mesh or shielding film. Found in RFID-blocking wallets and bags, metal mesh and metalized films offer superior durability in a thin form.

It’s important to keep in mind that effectiveness and longevity depend on more than materials. In fact, proper build and layering techniques often matter more, as even the strongest metals can fail if they’re too thin.

How important is RFID technology?

While RFID has been around for well over a century, its importance has only grown in recent decades. As the tech became smaller and cheaper to manufacture, it found its way into various industries, including payments, logistics, and access control.

Modern RFID readers and tags have broad use cases. They power contactless bank cards to enable instantaneous purchases, facilitate inventory management in retail stores and warehouses, track products and people over great distances, grant access to restricted company areas to authorized employees, and more. And there’s a good reason for it all.

RFID systems offer both efficiency and convenience that wouldn’t be possible without them. For starters, they can significantly reduce checkout lines, resulting in faster and more seamless transactions. They also enable simultaneous scanning of multiple items and provide real-time visibility into inventory and item locations.

However, this convenience also comes with certain risks. As RFID is a wireless communication system, signals can be easily intercepted without proper security measures in place. This opens the doors for unauthorized access to information stored on RFID microchips.

Does RFID blocking work?

Whether RFID-blocking gadgets like wallets and bags can deliver on their promises primarily depends on their build quality. Products that are well-made and use thick and dense shielding materials will have no issues stopping skimmers from obtaining your personal or financial data. But get a cheap sleeve, and it won’t do anything.

Then, there’s the distinction between active and passive RFID tags. The former, which are often used in warehouses and electronic toll systems, have built-in batteries that drastically extend their range. In this case, RFID-blocking wallets and sleeves probably won’t do much.

On the other hand, passive RFID tags, commonly found in bank cards and passports, have much shorter ranges. As such, they can easily be blocked by most materials.

If you want to learn more, read our guide on "Do RFID blocking cards really work?"

RFID blocking example products

RFID blocking comes in all shapes and forms. But in most cases, you’ll come across these popular products:

• RFID-blocking cards
• RFID-blocking wallets
• RFID sleeves for cards
• RFID passport holders
• RFID backpacks and bags

If you’re trying to protect your credit and debit cards from skimmers, you can put one or two RFID-blocking cards in the front and back of your regular wallet. A specialized RFID-blocking wallet achieves a similar effect by incorporating protective materials into its fabric. Meanwhile, an RFID sleeve provides affordable single-card protection and fits inside wallets or pockets.

For travelers, an RFID passport holder delivers protection comparable to a wallet but in a bulkier form to accommodate a modern passport, so it may not fit in your pocket. And if you’re carrying multiple passports and cards, say on a family trip, an RFID backpack or bag makes the most sense.

Pros and cons of different RFID-blocking products

As you can imagine, each of the aforementioned gadgets has its own strengths and weaknesses. So, let’s explore them and see what each product is best suited for:

Product	Advantages	Drawbacks	Best for
RFID-blocking cards	Small, lightweight design and affordable price	Take up a card space in your wallet	Users who want to keep their regular wallets
RFID-blocking wallets	Protection for all cards inside	Bulkier design than most regular wallets	People with multiple RFID-enabled cards
RFID sleeves for cards	Affordable price	Single-card protection	Minimalists
RFID passport holders	Travel-first protection	Bulky design, may not fit inside a pocket	Occasional travelers
RFID backpacks and bags	Complete protection for multiple RFID-enabled items	Higher cost and mass	Frequent flyers and tourists on family vacations

To sum up, smaller options, such as cards and sleeves, are easy to carry and fit in existing wallets, but they cover fewer items. On the other hand, RFID-blocking wallets, passport holders, backpacks, and bags offer broader protection, but they’re also bulkier and more expensive.

In any case, I’d recommend RFID-blocking cards, wallets, and sleeves to everyone. It’s up to you to decide which of these to choose, depending on your style and protection needs.

What to do if your RFID protection fails

While a high-quality RFID-blocking device can last for years without a problem, issues can still occur, and protection can fail. If that happens, you’ll want to take the following steps:

• Enable alerts for all transactions. Head into your bank’s mobile app or log in to eBanking on your computer and set up SMS or email alerts. This way, you’ll receive notifications even if it wasn't you who made the transaction.
• Regularly monitor your bank statements. Thoroughly review your bank’s monthly statements, looking for any suspicious transactions you don’t recall making.
• Cancel the compromised cards. If you’re positive that your credit or debit card has been skimmed, cancel it immediately. You can usually do so within the mobile app.
• Report incidents to your bank or card issuer. Whether you’re replacing the canceled card right away or later, you should report RFID skimming to your bank or card issuer as soon as it happens. Contacting the police is also advisable.

If you notice wear and tear, replace the RFID-blocking device as soon as possible. Remember, it’s all about acting proactively, and that goes for monitoring your accounts, staying alert, and reporting, as well. This can limit damage and prevent serious problems.

The best ways to protect your personal data

RFID blocking is only one piece of the broader data-protection puzzle. With data breaches and identity theft becoming more common by the day, a multi-layered approach is a must if you want to truly protect your personal information and financial data. Here’s what that entails:

• Using RFID-blocking gadgets. Whether you opt for an RFID-blocking card like Credifence or get a wallet, sleeve, passport holder, bag, or backpack, you’ll significantly reduce the chances of your bank cards and documents being skimmed.
• Monitoring your identity. Subscribing to an identity monitoring service is also worth it. Such a tool can detect potential incidents early and alert you, giving you ample time to respond.
• Setting up credit alerts. Many banks allow you to set notifications for changes in your credit report, which can help pinpoint suspicious activities. You can also request these reports from the three federal credit bureaus at no cost whatsoever.
• Leveraging digital security tools. Antivirus programs, anti-malware software, firewalls, VPNs, and password managers are all great tools to have in your digital arsenal.

Final thoughts

So, at the end of the day, is RFID blocking necessary? Well, after compiling all the data that the Cybernews research crew and I have gathered, I can confidently say that it is. That’s especially true for avid travelers and those who spend a lot of time in public places, be it on the metro or in a large town square.

That said, RFID-blocking alone isn’t enough for proper data protection. That requires a multilayered approach that includes RFID-blocking devices like Credifence, credit and identity monitoring, and the use of digital security tools like VPNs, password managers, and antivirus software.

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