Hey all! I wanted to start a thread discussing possible designs for wearable countermeasures to help protect implants while in particularly risky RF environments like DEFCON, from tools like NFCKill (NFC Kill – NFCKill).
There are two options I currently imagine:
An RF insulating fabric
3d printed RF insulating plates
Anyone have an idea to toss in?
Maybe some experience with making wearables?
3-D printing plates and coating them in a paintable aluminum coating would work. Pieces would be custom obviously, unless there is cheap “fabric” idk something with metals particles woven in it could work.
Nice find!
Just picked up a yard for testing.
I also have some of these…
…Found this.
Unfortunately they were testing in the 3.5 - 7 GHz range. But PLA with a carbon mix looks to be a promising option nonetheless.
$100 for 100grams, almost as expensive as it is cool.
great for projects
It’s going to have to be breathable, I’m not sure if this product will breath enough, imagine wearing rubber gloves for an hour and how much sweat
Builds up underneath, You don’t want that to happen.
Chainmail comes to mind but that stuff is heavy.
So…
•Breathable (for comfort)
•Lightweight (for comfort)
•Nonconductive (for safety)
•Breakaway/Ripaway (for safety)
•Affordable/Maybe disposable?
•…That’s all I got…
•
2nd edit: I was googling ‘arm bands’ for ideas and saw ‘arm sleeves’, So basically an arm sleeve with stainless steel woven in, But the sleeves stop at the wrist which may or may not be a good thing.
What about gloves with a metal grid in it, like a faraday cage?
All I can say is that a friend of mine made pants pockets with similar “faraday fabric” and he was able to put his hands into his pockets to adequately protect his NFC chip from reading, but his 125kHz xEM was not so lucky and was still readable.
That’s what I’m betting will be the result with what I’ve ordered as well (which just arrived today).
It blocks the 13.56MHz, but I still need to check the 125KHz.
It’s dangerous to go alone, take this.
Pyralux might also work. I haven’t tried it yet.
Line the arm pits with it and cross your arms?
Titan RF fabric vs the NFCKill.
While it does seem to protect against the absolute disabling of the field detector there was a significant brightness change that may not have been captured on video. I’m betting this still has the potential to corrupt information on the more capable implants.
Just asked about this in your other post ;p
So, since the Titan fabric doesn’t do enough shielding alone I think I’m going to shift to a 3d printed solution. I just bought a Prusa i3 Mk3s but it won’t be in for a few weeks at least, I’m also going to pick up some of that PLA-Graphene filament. I’m looking at 3d scanners too that might help with creating a custom fitting piece.
I found some promising projects on this page:
https://www.myminifactory.com/search/?query=fabric
Like this one:
And This one:
I also found this video with a process that might help integrate some PLA-Graphene hexagon panels into the Titan fabric.
Progress will probably be slow for a while, but I’m thinking we should have some sort of fieldable prototype ready for Defcon.
Can you try making the sheets of material smaller, like the size of the reader face itself?
