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  • Thank you! I hope this is helpful in doing so, let me know where you get with it!

    Thank you!

    Good to know!

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    • RFID NFC Tap and Go Ring for Credit Card Payment
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  • Let me know how you get on and if there's anything I can streamline in the instructions!

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  • Oh no! Yeah that's not helpful. In the US I think there's a limit of a few hundred with most banks. I have not found it yet.

    So I should be aiming for 13.62" for winding the ring. I measured the original antenna very carefully the first time. I wonder why they made it 30" instead of 27.25"Curious.

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  • That's good to know! I asked my bank about those as I remembered them from the first generation of RFID credit cards 5 or 6 years ago, but they didn't issue them. Good to know that some have them available, they would definitely work well for this. The chip's board might even be smaller since it's intended to go in a smaller form factor. Thanks for the tip!

    Let me know how watch band goes, it should work just fine. Run the antenna as far out in the band as you can get it without compromising structure, if you're going to do it internally. You might also get good results running it around behind the watchband and then "laminating" it with something so it's not rubbing on your skin.

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  • From what I've seen they've done a significantly better job with the encryption on the newer generation of cards that just came out.

    That's fantastic! I wish I loved in a city with public transit. I'd make another ring :)I actually used this to purchase transit directly in chicago, since they allow CC taps to pay for a ride without needing a ticket. And yeah, if you tell them the stripe/chip is just worn/wearing out they won't, since you probably have it set up for 30 different things for autopay. Or at least that's what you can tell them ;)

    I just say mine's worn and I get another with the same number. I wonder if it's only America they do this. God that's gotta be annoying to swap everything over to the new number if your chip wears out.

    This is a very common question I get, that I tend to break down into a few parts. The first is that (AFAIK) with the new generation of RFID cards, the only current feasible attack is one in which you need to have a reader near the ring that's relaying the wireless data to a repeater that's near a point of sale terminal. Not impossible, but from what I know (and that brings me to my second point...)Due to the difficulty, the fact that your reader would have to be within an inch of the ring, and the ease of skimming magnetic strips at gas stations or buying CC numbers by the hundreds off insecure website hacks, most people just don't bother the first route.It's the same as when people ask me about my RFID car door reader that unlocks my car. "Couldn't they skim your chip and replay it?…

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    This is a very common question I get, that I tend to break down into a few parts. The first is that (AFAIK) with the new generation of RFID cards, the only current feasible attack is one in which you need to have a reader near the ring that's relaying the wireless data to a repeater that's near a point of sale terminal. Not impossible, but from what I know (and that brings me to my second point...)Due to the difficulty, the fact that your reader would have to be within an inch of the ring, and the ease of skimming magnetic strips at gas stations or buying CC numbers by the hundreds off insecure website hacks, most people just don't bother the first route.It's the same as when people ask me about my RFID car door reader that unlocks my car. "Couldn't they skim your chip and replay it?" Well yes they could, for a few hundred in equipment and a fair bit of time, or they could pick up a brick off the sidewalk for free and break the windows and achieve the same result. Honestly, I'm a lot more worried about the second one.

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  • Thank you! Entered.

    Thank you! I'd seen similar ideas with NFC tags and such, but none made out of the RFID chip in a CC. Figured I'd share my experiences and hopefully save others some time.

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