xAC alternatives / let’s build a more secure alternative?

I’m interested in moving to a higher level than 125khz UID based access controller for my gun safes and or other future projects like car or house or whatever
(The xac has an unfortunate flaw, and let’s be honest UID only is pretty low anyways)

But I figured maybe we can workshop some kind of generic kit that can work for others also

Is there a 13.56mhz similar all in one timer relay kit?

Mifare classic would be acceptable, desfire could be pretty cool

Ideally it needs to function the same as a XAC,
NO relay for a few seconds upon authorization, preferably run on 9-12v, preferably have a detached antenna to allow for the system to remain secure and only expose the antenna

It could be larger than the XAC, but should still be small enough that a small 3d printed housing can hold everything as a sub assembly

1 Like

I have this as my garage door opener. I brought a 13.56 reader and a control board from AliExpress. All under about $30AU. Took forever to arrive but works a treat. It works with both my xM1 and my NExT.

I will go back through the purchase history and find it and post the links. It was a 12vdc set up and had NO and NC with relay or power supplied switch.

Very interesting, I didn’t expect a home run right away

That’s awesome

Did a little poking around on ALIexpress

Found 2-3 options I might experiment with

I’m not convinced that any of them are actually using mifare system, still just pulling the uid… but it’s still a smidge better I guess

I also see a blue pcb and slightly different proportion version of then xac… I might try it to see if it also has the exploit

1 Like

if it’s just pulling UIDs and you can add your own it will most certainly not be wanting mifare classic instead just using the Iso14443a generic call for UID commands.

if you wanted something actually secure it would require writing custom keys and block data that (optionally) change on auth. using a uid for auth makes it the same as the xac but with more chip variety

Interested in this.

I don’t know squat, but am using the xac for my vehicle door.

Would like something as secure as possible.

That’s still understandable for noobs like me.

Yeah. Mine is certainly only pulling the UID, but I figure I also have a keypad which takes an 8 digit code as a seperate option (my wife has no implants) and the UID from both the NExT and xM1 are longer than that…

I can’t add a link but the store I used on Ali was Asia-Teco for their 13.56 reader “waterproof 125KHz 13.56MHz compatible proximity reader”. It is about the size of a AU10 cent piece or US dime.

It works with the Wiegand standard 26 bit.

The controller is from same place. It is called “Sboard mini single door access control board”.

Both around $AU28.

The instructions on the controller were a bit hard to understand in terms of placing the jumpers. They have to be repositioned if you want the relay to work as an unpowered circuit. When I first read them I thought you just had to remove one but you actually have to turn it. If anyone gets this and needs help I can send a pick of mine. Without moving the jumpers it operates as a relay which provides power on the NO or NC wire.

Hope it helps. I have tried the “vulnerability” on these (assuming I have understood what it uses) and they appear safe.




NZ$ 26.17 11%OFF | Waterproof 125KHz 13.56Mhz Compatible Proximity RFID Card Reader Wiegand 26 Reader Door Access Control System Kit


1 Like


First color is very similar to the xACv2, but small

Second color option is 13.56 and a different antenna, but no real pictures of it

Another option but appears to be only 12v not a NO/NC relay

Double antenna variant

I’m definitely willing to get an try the two that look like they might work for my project.
Door opener for a magnitic locked door.

But I don’t know anything. Haha.
So couldn’t test for the glitch to see if they’re any better.

Willing to help if I can. Please let me know how. Would like to get a secure lock for my RV. Thanks for this thread.

US $14.75 52%OFF | EMID Access Control Board 125KHZ RFID Embedded control board DC12V Normally open control board

And the one below it.

Sorry im late to the party. I think i have a solution for you. Here is the simple sexy. Customisable nfc acsess controlers.


I’ve seen it mentioned before. But was never fully clear on its setup

I get the sinking feeling seeing those boards I’d need to do firmware compiling

Download code and libraries In arduino ide. Add uid and what you want to trigger. And how long. Upload. Enjoy

The 3 alternatives I ordered have arrived,

If I can find my rfid box with bread board and 12v power supply I’ll let you know soon if these are worthwhile or worthless

1 Like

Thank youuuuuu

Where do you get the relay board? Is there a post on this setup anywhere?

They make it themselves I believe

Yeah he does, you will find him and his simple sexy channel over on the Discord.
He is much more active over there

I get home in maybe maybe 4-5 hours and I’ll
See what’s what