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I don 't care how "fancy " a design is, or if it is made by some frou-frou brand, in this day a...


G+_George Kozi
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Originally shared by George Kozi

 

I don't care how "fancy" a design is, or if it is made by some frou-frou brand, in this day and age, if a wallet doesen't have RFID/NFC blocking, it's not worth ANYTHING . You should take a look at the wallet you are carrying around. All the cards these days NEED protection.

 

I ordered one of these on Amazon yesterday. It costs 11.99 € . Leather, RFID blocking, and the "accordion" design is something I like. It gives easy access to the cards without having to fütz around with shoving them into slots.

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Ponder for a moment, just how hard it would be to scan your NFC-chipped card in you wallet in your pocket. A regular scanner would have have to be within a centimetre of your card to be able to work so that means the person using the device would literally need to be breathing down your neck because the chips response is so weak. Because the chip in your card transmits omnidirectionally, the strength of the signal falls exponentially relative to (4?R)², so at 1m away the signal is 157 times less and would require a visible antenna array. At 2m away the signal strength would be 631 times fainter, requiring even a bigger array.

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By the way... if you lift a shirt from a store and try to walk out with it, the alarm will sound, even if those antena/gates are a meter or so away from you. What would stop a determined gang from rigging one of those up to read the cards in your wallet? It's a bigass antena and it could be made to look like anything.... even put it under the ice cream vendor's cart orin a doorpost at the airport... leave it there to do it's work for a month or so...

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I'm using NFC every day in every store around here (The Netherlands). Everybody has the gear deployed, from the local supermarket to the green grocer, to the asian store on the corner etc. It's ubiquitous. It has been so for like two years. All I do is wave my card on the side of ot above the terminal. The machine goes "beep" within a second and I payed.

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Hey man, use whatever you need to use to ease you fears of being robbed. But the sentiment of "because it's not rfid/nfc blocking it's not worth it at all" is not popular, most people don't care. Our money is insured. The bank will replace it 100%. It's a minor inconvenience if any.

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George Kozi Those RFID tags for merchandise are very different from NFC chips. They are designed to output far more power back when pinged which is why they can be read 1m away. And those antenna arrays are huge aren't they? From the floor to your waist and as wide as you are to pick up that more powerful response response. And the antennae on those tags are also several times the size of the ones on your chip-card to enable that more powerful return.

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Try leaving your chip card in your normal wallet and scan it that way, does it work? Maybe, maybe not. In my leather wallet it works maybe half the time if and only if the card is in an outside pocket with only one layer of leather. If it's in an inside pocket and my wallet is folded shut there are several layers of leather or cloth and a few other cards in the way, it never works.

 

How close do you think somebody can get to your back pocket where you wallet is with reader 4 or 5 times the size of those counter-top readers in the stores?

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