/tech/ - Remember when RFID blocking was all the rage?. https://www.npr.org/sections/alltechconsidered/2017/07/04/535518514/there-are-plenty-of-rfid-blocking-products-but-do-you-need-them. . >Still, people are worried about electronic pickpocketing

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Anonymous 2023-05-03 (Wed) 01:06:47 No.19478

Remember when RFID blocking was all the rage?
https://www.npr.org/sections/alltechconsidered/2017/07/04/535518514/there-are-plenty-of-rfid-blocking-products-but-do-you-need-them

>Still, people are worried about electronic pickpocketing — worried enough to strap on RFID-blocking fanny packs, even skinny jeans.
lol

Anonymous 2023-05-03 (Wed) 09:48:09 No.19479

File: 1683107289696.jpg (23.9 KB, 800x600, Montreal-tower-top.thumb2.jpg)

myeah given that RFID readers in stores and whatnot can barely read the damn things even when you're pressing your debit card to them, I wouldn't be so worried. plus there's the fact that people often have more than one RFID card in their wallet, negating almost the entire benefit compared to a magnetic stripe. you can even see that they need to basically touch their victim's ass for it to work
a friend of mine asked me what it would take to be able to read an RFID card from say 50 meters away. I pointed out that 13.56 MHz has a wavelength of 22 meters or so, so any practical antenna will have a width on the order of half of that, plus you'd need a lot of power. so basically you'd have to set up an HF station nearby and somehow point a long Yagi-Uda antenna at the target without them noticing. something like pic related
with LF (120-150 kHz) tags it becomes even more ridiculous, but maybe you could wrap a reading coil around the ground where you expect your target to be or something