Is RFID blocking necessary technology? There is quite a lot of debate about whether the RFID blocking technology is really needed or whether it is just a need created by marketers. We found an interesting article with an opinion against the use of RFID blocking technologies. The article below appeared on (then moved to another project CSO) written by Roger A. Grimes — Columnist. 

Is RFID blocking necessary technology, photo

We recommend you to read this articleRFID Cloaked company’s experts don’t agree with this opinion. We have seen examples of cloning and scanning attacks and have duplicated a hacked RFID scanner to prove the concept works. RFID contactless cards can be scanned, copied, and cloned and unauthorized payments made. We write about this in our blog. For example. This article describes in detail the techniques for hacking RFID using NFC smartphones.

Reference to CSO article →

We have read comments on this issue. Users disagreed with the columnist. Here are some of them.

Tamera Selhaver

I think the author is clueless. My husband and I had all of our debit card numbers stolen while shopping together. He rarely carries his wallet as I always have my purse so it was easy to figure out exactly what location we were at when we got “scanned.” All our debit cards except one credit card (already had smart chip technology) were stolen. Of course now all of our debit cards have smart chips so this is “supposedly” a moot point. But 4 years ago I was first in line for a protective wallet after getting tired of tinfoil. Never had another issue but was super careful about even taking a card out to slide and pay. I don’t see it taking that long before they figure out how to get around the chip. Nothing is foolproof.

Koruma Wallets
Sooner or later all cards will be contactless with RFID feature. In Europe this kind of cards is more and more popular. Sometimes people like it and sometimes hate.Our answer to this article is “Better safe than sorry”.

John Smith
Nice how the author has zero response to any of these comments!! Someone is wrong here and he wont even debate or defend this article.

American Express notified me that someone tried to charge a $404.00 meal in Las Vegas. They denied it and cancelled my card. I had been to a shopping mall but had not used my card. Only used my card at CostCo.

Ryan Swan
Your card was probably cloned. Happens all the time. You probably inserted your card into a reader with a skimmer. If that isnt the case then someone randomly got your cards 16 digits by chance. They recycle the numbers because they have all been used by now.

Rockinon Ldn
Lots and lots of cards in Canada are RFID enabled. Once my wife’s card was read from more than a foot away by a more powerful than usual card reader at a cashier’s counter. My inexpensive wallet, purchased at Costco, is RFID proof. After seeing my wife’s card read from some distance, I’m pleased to have my RFID proof wallet. And do we use the RFID feature? All the time!

Ryan J
Use a faraday bag for your phone when traveling, or in risky areas. Use them when you’re on the move if you feel like you’re being tracked. These used to be “paranoid” concerns but not so much these days. They offer a level of assurance that provides peace of mind. Yes, you can’t receive calls when the phone is inside the bag, but you’re only using the bag when you feel you may be at risk. Attending a large conference? Good time to use a faraday bag. Think about it people, all the data you possess is on that little device just begging to be taken. Make sure you don’t buy a tin foil piece of crap anti-static bag though, I’ve tried those and they don’t work. They’re marketed as “faraday bags” but they most certainly are not. Buy a dual paired seam forensic faraday bag and you will be safe.

Nate Abshire
Wow, you’re terribly misinformed. Your article is practically a joke. In Canada yes, most major credit cards DO in fact transmit. It’s never been more important to secure your cards in an RFID transmission blocking case than these days. Do some research before laying down a couple grand worth of useless words.

Ray Croft
Just because i am paranoid, that does not mean that they are not after me!

Gage Merrell
Is this guy joking? Almost everyone in Canada has an RFID enabled card now… It’s the easiest way to way for our Tim Hortons after all. Are the RFID blockers the only way to protect your credit card? Of course not. Is it a terrible idea to have one built in anyways? Again, of course not. It is difficult for me to agree any additional protection is meaningless. I also understand that the USA is significantly behind in payment security, I work with payment security equipment everyday, but here in Canada, contactless pay has become very popular.

Bek O’Toole
I work in a small country town bag shop and we sell RFID protection in most of our wallets/purses etc. In the last 3 days I have had 2 customers who’s money has been stolen in this way. One poor bloke had $2000 an the other nearly $300. I get customers all the time coming in BECAUSE their money has been stolen in this way. It is a small country town as well, not a city and it still happens all the time. Where is he getting his evidence from?

Gethin Hill
Haha is this guy for real? Security Adviser? If you hired this guy for your security, i’d be very worried.. 40 computer certifications and eight books and he’s giving this kind of advice?

Gertjan Assies
That’s a pretty ignorant point of view, since 2008 it is possible to wirelessly do small payments without using a pin. so a mobile device with a amount less then 25 euro/dollar/pound entered and a busy public transport system is all it takes.

Dean Oliffe
Totally disagree with this article and it sounds like a editorial piece for the industry pushing this payment method. Personally anything to do with security of users banking accounts (access etc) should be secured with a PIN. Then if the user wishes to Opt in to Paywave or paypass etc then that should be their choice alone. The two vendors and the banks should be focused on the security of our funds and not half arsed implementations when all the required functionality, trust and user understanding for PIN’s exists already. It’s articles like this that get me going. We can of course agree to disagree, but as I can see from the other comments this article doesn’t get much in real world support.

Adam Bruce
You need to check your statistics mate, “If you look at the number of credit cards with RFID, you can’t even represent it statistically. It’s not 0 percent, but it’s so far below 1 percent that it might as well be 0 percent ”

In the UK these cards are becoming widely adopted, If you look at the UK card associatoin website you will see that there are currently almost 80 million contactless card in use in the UK, meaining most people have more than one.

Sharon Johnson
My debit card doesn’t have an RFID chip. It has the strip on the back. My card was read while out and $2000 was stolen out of my bank. The card was never out of my possession. It happened just hours after using it at Walmart.

Eric Shook
Your card was likely cloned when you paid, not read by an rfid scanner…

Pete Dee
The main reason that the secure chips on the credit cards were that the pay phones were being pried open by the immigrants in France to get any coins in the pay phones. These chips are so secure now the US Military ID’s have these chips on them. What does that say for security. My new Mastercard has that chip and 99% of the places i shop don’t use the chip feature. Walmart is the only company I know that has their cash registers chip readers enabled. this secure chip is the wave of the future Recently in Paris France the parking spots were chip credit cards only so finding a parking spot and paying for it is a lot more difficult with out the credit card with the chip

Sarah West
With such a low adoption level in the USA, it’s hardly surprising there won’t have been many reports of problems. That doesn’t mean that things can’t go wrong.

Here in the UK, it’s now very difficult to get a new bank card without contactless payment enabled. Many banks simply don’t do them and contactless readers are everywhere now. The UK Cards Association released statistics showing that in November 2015, there were 78.3 million contactless payment cards in circulation in the UK. That’s in a country with a population below 70 million. See

With such widespread use, there have been a number of problems. Accidental payments are reported to have taken place more than once at one of the UK’s leading retailers, Marks & Spencer (

Only two days ago, Roi Perez, a community manager for SC computer security magazine was featured in my local newspaper after having discovered an unauthorized debit from his card. Read the article at

Roger Gong
All my credit cards are wireless payment enabled, as the wireless payment won’t require the user to key in PIN or any identification secret, I’m sure the bad guys are able to steal your money by using a device functionally similar to the wireless payment terminal when you don’t have some kind of signal blocking wallet.

David Brodbeck
In theory they could do that, but the RFID payment system is generally limited to small transactions, and each transaction is a one-time challenge-response exchange where the card has to be present (you can’t just store the info and use it again later). So our theoretical thief would have to sit there making small transactions as people walked by. He’d be better off getting a job as a waiter and just taking a picture of every card he was handed.
Also, consumers don’t have to pay for fraudulent charges — the bank or merchant has to eat the cost. They’re the ones who stand to lose the most from theft, so if they’re issuing these cards, it clearly isn’t a concern for them.

Lee Adkins
Maximum charge in the UK is £30, unskilled workers probably average £45 a day after tax so with just two swipes you’re up £15. Get 5-6 and you are close to not having to work for a week.

I don’t believe its going to be a really prevalent form of attack however I wouldn’t discount desperate people attempting it. I agree with you that the banks are pretty good at refunding fraudulent activity as I’ve had it happen myself (I suspect from a large database hack as I’m careful where I use it) and if it did become an epidemic of sorts they would soon do something about it.

I now really would like to know how far away one has to be in order to steal the card infos? Are we talking about meters or centimeters?
Here in Austria one could get away with 80Euros, when using the card 4times until we have to put in our PIN again.

You don’t want to tell me that it is enough to have a photo of a card with RFID in order for everyone using it for payments? This really would be scary!

Cliff Crabtree
Putting a Faraday cage around your smart phone would be far more effective. You could not make or receive phone calls until it was removed though. The RFID blocking products would probably not have gotten any kind of a foothold on the market if smart phone payment systems had been widely deployed first.

Thus, we are once again confirmed in the opinion that RFID blocking technology is still necessary.

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Edited in August 2020