The RFID signals can't travel through the saltwater in your body. You can also immerse the credit card in saltwater to prevent RFID readers from reading it. Of course, this is less practical.

Learn how RFID-blocking cards work, what they protect against, and which options offer the best everyday security in 2025.

Security Alert RFID Credit Cards Are Easy Prey for Hackers, Demo Shows Security Alert By Katherine Noyes, Feb 1, 2012 10:51 am PST ...

Anyone can buy an RFID credit card reader online, where second-hand units sometimes go for under $10, and start scanning cards in public, without cardholders knowing.

What makes this form of payment so convenient is that the card is always active and ready to transmit data, but this also makes it susceptible to sending data to readers you don’t want.

ZKAccess, a division of ZKTeco and leading provider of biometric and RFID security solutions, has introduced the LR-UHF-12, an outdoor IP66-rated long-range125 kHz proximity card reader designed ...

The ChameleonMini is a tool that allows you to emulate and clone high-frequency contactless cards and read RFID tags. It functions as an NFC emulator and RFID reader and can sniff and log radio ...

The card reader can be used two further enhance both Arduino and Raspberry Pi projects and is now available from just C$21 or roughly £13 with worldwide delivery expected to take place during ...

Identification by smartphone Apart from supporting the majority of RFID technologies, the reader/writer supports NFC and Bluetooth Low Energy (BLE) technologies, which are commonly applied in devices ...