There is in quantum computing lol
True, but the options available to a qubit still donāt allow for ānot existingāā¦ even if schrodingers bit is superpositioned.
Well I just bought 3 potential control boards from ali to try out
1 very similar to the xac, but a blue and pcb slightly different board layout, hopefully a different manufacturerā¦ and not running ripped off firmware 
2 double antenna xac, very different board layout, hopefully not running the same firmware
3, very similar to xac but running 13.56 with a daughter board on the antennaā¦
Give shipping a month or so
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Anything that fails with the exploit Iāll plan to return, and I think Iāll leave a public review posting about itā¦
It may be the only thing that might get a response from them 
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I never would have written code that mapped the UIDs in the EEPROM simply by offset without any āin useā flag. Crazy. Looked into the processor they use and itās a clone of an ancient 8051. Was hoping it was something more modern where we could just write our own code. Iām not familiar with the 8051 or itās toolchainā¦
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Mind getting links to the second 2? Sounds kinda interesting with 2 input antennas, also hf is hf.
Edit: nevermind I think I found it
https://a.aliexpress.com/_mKfAfJ6
https://a.aliexpress.com/_mKJYGuY
This one both ācolorsā there only an icon for the 13.56 version
Did you try out those boards?
Yep, I swear I posted that I tested them,
The second link above the blue board single antenna didnāt have the exploit,
However it was noted that they only check the first half? Or 2? Bits I forget the details they are on here somewhereā¦. But a weak password is still better than essentially 0000000 as a master password
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Is this still an issue with the xAC v4?
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The v4 should not have this vulnerability.
Read post below.
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sigh It does presently. We are working to resolve this. The v3 did not. Two steps forward, one step backā¦ Iāll post here when I get an update.
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