What kind of security protocols do current NFC or RFID based technologies use?

I have an information security class this semester, and I need to write a paper evaluating how secure NFC and RFID technology is.
A lot of questions previously asked here are at least 3 years old, and I’m sure computing power within NFC an… Continue reading What kind of security protocols do current NFC or RFID based technologies use?

What’s On Your Bank Card? Hacker Tool Teaches All About NFC and RFID

Flipper Zero tool reading bank card, displaying data on LCD

The Flipper Zero hacker tool is a multipurpose hacker tool that aims to make the world of hardware hacking more accessible with a slick design, wide array of capabilities, and …read more Continue reading What’s On Your Bank Card? Hacker Tool Teaches All About NFC and RFID

How can those "RFID signal blocker cards" work without any kind of battery or power of any kind?

https://www.netonnet.se/art/hem-hushall/bra-att-ha-hemma/safe-n-sound-antiskim-card/1011895.9253/
This card is apparently put in your wallet and protects your pay cards from skimming, by "sending out a jamming signal".
Infuriatin… Continue reading How can those "RFID signal blocker cards" work without any kind of battery or power of any kind?