Passive Shielding: These RFID blocking cards contain a layer of metal or conductive material that creates a Faraday cage around the card.  This Faraday cage blocks electromagnetic fields, preventing the RFID scanner from communicating with the RFID chip in the card.

Active Jamming: Some advanced RFID blocking cards contain a battery-powered chip that emits a signal to jam the RFID scanner, effectively jamming communication attempts.  This type of card is less common due to the power required.

Do RFID blocking cards really work?

The effectiveness of RFID blocking cards has been a topic of debate.  Here are a few points to consider:

Testing and evidence: Extensive testing by security experts and consumer protection agencies shows that high-quality RFID blocking cards are effective in preventing unauthorized RFID scanning.  These tests typically involve using an RFID scanner to attempt to read information on an RFID-enabled card, with or without a blocking card.

Quality and Construction: The effectiveness of an RFID blocking card largely depends on its construction. High-quality cards made from appropriately shielded materials are more likely to provide reliable protection.  In contrast, a poorly made card may offer little protection.

Range of protection: While RFID blocking cards are effective at close range, their effectiveness may be reduced if the RFID scanner is more powerful or farther away.  However, for most everyday situations, a well-made RFID blocking card will suffice.

Are RFID blocking cards worth it?

The decision to invest in an RFID blocking card depends on your personal security needs and concerns.  Here are some reasons why you might consider using them:

Peace of mind: For many people, the main benefit of an RFID blocking card is peace of mind.  It can be reassuring to know that you have an extra layer of protection against potential theft attempts.

Low cost: RFID blocking cards are generally inexpensive and easy to use.  They fit in your wallet with other cards without adding too much bulk.

Widespread use of RFID: As RFID technology becomes more common in credit cards, passports and other forms of identification, the risk of theft increases.  Using RFID blocking cards is a proactive measure to protect your data.

High-quality RFID blocking cards have been proven to provide reliable protection in everyday scenarios.  For those concerned about digital security and looking for an affordable and convenient solution, RFID blocking cards are worth considering.  Currently, SHENZHEN ZHIJIE IOT APPLICATION CO.LTD has a variety of optional materials for making rfid shielding cards, such as aluminum foil, shielding chips, etc. w can provide RFID blocking cards with different thicknesses, such as 0.8mm, 0.9mm, 1.0, 1.5cm and 1.6cm, which contain rfid blocking chips. The usual blocking distance is 2-3cm on each side. Customized printing and packaging are available. Welcome to visit online.