What is RFID Blocking & How is it Used?

Now that many products use RFID technology, there are lots of people who feel concerned when it comes to their security.

For that reason, the market now has a vast number of products claiming to block RFID.

Let’s check out RFID blocking and how it works.

Types of RFID Blocking

RFID blocking systems and devices lessen the reader’s transmitted power signal, preventing the RFID card’s microchip from working.

Because of that, it ensures the security of the RFID card.

RFID readers essentially transmit signals that power the card’s microchip.

Then, the card’s microchip will power up and have the information returned to the reader.

You can prevent this by transmitting a signal that can interfere with the reader.

However, this can only work with a specific type of technology and just one frequency.

rfid blocking

Radiofrequency Identification Tags: What are they?

The same basic technology is vital in contactless cards, passports, ID cards, temporary cards, and payment cards.

RFID means Radio Frequencies Identification.

This system makes use of the radio waves so it can transmit, read, and capture information that is stored inside a tag and attached to any object.

  • If you want to read the Radio Frequency identification tag, it doesn’t need to be directly within the reader’s line of sight.
  • Since RFID tags are minor, producing them is now more affordable, making them popular.
  • It can be possible to have Radio frequency identification tags read wirelessly from several feet away.

A microchip in your contactless passport, security card, and bank card links to an antenna.

Radio frequencies in a standard set of 13.56 Mhz are what passports and bank cards use.

Product tags, keys, and security passes often use 13.56 Mhz and 125 kHz.

Many RFID systems have a design that can work at a short range, typically just several inches.

However, there are now influential RFID readers that can read a meter away and hackers that are 30 meters away can be a concern – which is why contactless cards may not be secure.

Active and Passive RFID Blocking Technology: How does RFID blocking work?


Generally, there are several ways RFID protectors, shields, and blocking cards work.

They can either be active or passive.

Passive protectors or guards are capable of deflecting or absorbing the RFID signal.

A microchip is what active RFID protectors or shields use.

Typically, an interfering signal is sent out.

It can be effective in pretending to be a different card that could cause a card clash in the reader.

It may also drain the power from the transmitting signal that requires control of your card’s chip.

Whenever the chip doesn’t get enough energy to function, a reply may not get transmitted.


Absorbed or Deflected RFID Signals

There are two ways passive shielding works.

The shield can absorb the power or energy, leading to absorption loss.

It can make the radiofrequency energy bounce that can lead to reflective loss.

Both of these can reduce the transmitting RF signal that can power the RFID chip.

Yet, having the RFID signals absorbed or deflected for contactless payment cards and banking cards at 13.56 MHz can be so much more straightforward than having passes and security cards blocked at 125 kHz.

Near field shielding is needed to protect the RFID chip at 125 kHz.

The Best Technology in RFID Protection

Whenever you want to provide the needed protection to any contactless card, it would be better to select solutions that can block every type of RFID signal.

RFID Clock was able to develop this technology.

It has the RFID blocking RFIDsecur fabric that can protect the different kinds of cards.

They had it tested and produced at the Brunel department of the Plymouth University in the UK where they also manufacture it.

The RFID blocking fabric or RFIDsecur was what they used to produce RFIDsecur RFIDsecur Blocking Contactless Cards.

With this superfine card, you can have every contactless card protected against 4G and 3G mobile phone signals, NFC and RFID, WiFi, and Bluetooth.

With RFID blocking cards, you can secure and protect your payment and ID cards from getting cloned, skimmed, and hacked from the most potent NFC and RFID readers that are at the 125Khz and 13.56Mhz frequencies.

Know About RFID Blocking and How You Can Use It with IRDA

With IRDA, you can get the information you need about Infrared Technologies, including WiFi, Radio Frequencies, and 3G.

Our small team of Tech Engineers and Electronics Technicians believe that everyone should be aware of safely using electronics.

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