Implant compatibility

Hello all, I currently have a VivoKey Spark 2, I’m looking to get another implant but I’m not sure which one to purchase. Im attempting to clone a fob from work (i’m an IT guy and my boss okayed it) the fob in question is an ioProxy fob which implant would be compatible with cloning this fob?

sorry for the delay

I’m not 100% certain , but still pretty sure an xEM, NExT or FlexEM etc is what you are after.
I’ll need to do a quick bit of research and get back to you…

The xEM implant contains a 125kHz T5577 RFID chip emulator that can behave like many different common low frequency chip types, including EM41xx, EM4200, HID 1326 ProxCard II, HID 1346 ProxCard III, Indala, Pyramid, Viking, AMV, Presco (and more)


even more confident.


As far as I know, ioProx fobs are a 125khz fob H10301, Weigand-26/XSF dual format so the xEM or NExT should definitely work.

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I was looking at the xEM but I wanted to ask before I made the decision myself, 90% sure the fob is a 125kHz but again, wanted to ask around.

Amazing thank you so much! Here comes my next project and

Thank you very much!

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If you wanted to put the xEM alongside (>5mm) the Spark 2, there would be no issue , If you are planning to put it elsewhere, Personally I would reccomend upgrading to the NExT


What would be the difference? Practically I mean, larger range? Or is it more of a tweaked and improved version?

Probably suggesting that for more of a future-proofing and general versatility since the NExT also has a 13.56MHz chip. You could get more “use per poke” so to speak :sweat_smile:

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Just read through the specs and I completely agree, last question. I have the VivoKey between my thumb and index finger and I’d want the door key to be on the outside of my hand That being said is feasible to get the NExT implanted on the outside of my pinky metacarpal?

before we get too carried away, I think you should get a T5577 test card FIRST

I’m still not :100: it’s compatiable

Yes that AND because NExT also has the High Frequency chip, if it’s placed next to another HF chip, you could experience some reading issues.

It is negligible, but through some testing we have seen that the xEM has slightly better range

I think this is the video

ALSO I just had a thought…

I knew it sounded familiar


[quote=“Bamfenjr, post:10, topic:14107, full:true”] That being said is feasible to get the NExT implanted on the outside of my pinky metacarpal?

That’s what we call Position 5 or a knife edge installation and it’s generally considered suitable for X-series bioglass implants (outside of any particular occupational hazards).


Fantastic! I’ll do some more research in the morning. Thank you both so much and I will keep you posted, also if I find out anymore information on the ioProxy system I will definitely be sharing

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These might be useful for you also


I have an IOProx II cloned to my NeXT implant, it works great for my office access control system. I used the instructions in this thread: Cloning a Kantech ioProx? - #8 by Satur9


Update: I’ve got the NeXT chip between my ring finger and pinky finger, I have the Proxmark3 easy. But next is the difficult part, I’ve tried to format the NeXT chip to read as an IoProx. I ran through the instructions in some of the tagged posts but with no luck. I also don’t want to screw up the chip. Any advice? Also if possible I would love to do a call with someone who has successfully cloned and made the NeXT chip function as an IoProx or at least someone who has a decent idea of how to get it to work. Thanks all. @theradioguy

LF reads with proxmark on these can be particularly tricky sometimes as they rely on very precise positioning.

Keep at it and try find a spot you can reliably read many times before attempting a write.

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Using lf search I was able to get it to read a few times so that isn’t the problem. When I try to run the command to reformat the chip to read as an ioprox using lf t55xx write b 0 d 00147040 it says something along the lines of invalid value “b” “0” “d”

Can you do a PM3 scan of the Prox card? and share it here?
We could probably give you the command line(s) to try
I say we, but I am away from my PM3s at the moment, but I am sure somebody else will jump in with the answer

This is the scan of my NeXT chip

Checking for known tags...
[+] EM 410x ID 7130007738
[+] EM410x ( RF/64 )
[=] -------- Possible de-scramble patterns ---------
[+] Unique TAG ID      : 8E0C00EE1C
[=] HoneyWell IdentKey
[+]     DEZ 8          : 00030520
[+]     DEZ 10         : 0805336888
[+]     DEZ 5.5        : 12288.30520
[+]     DEZ 3.5A       : 113.30520
[+]     DEZ 3.5B       : 048.30520
[+]     DEZ 3.5C       : 000.30520
[+]     DEZ 14/IK2     : 00486136641336
[+]     DEZ 15/IK3     : 000610086743580
[+]     DEZ 20/ZK      : 08140012000014140112
[+] Other              : 30520_000_00030520
[+] Pattern Paxton     : 1897182520 [0x7114B538]
[+] Pattern 1          : 56462 [0xDC8E]
[+] Pattern Sebury     : 30520 0 30520  [0x7738 0x0 0x7738]
[=] ------------------------------------------------

[+] Valid EM410x ID found!

and the IoProx

Checking for known tags...
[+] IO Prox - XSF(01)58:54738, Raw: 007856203d5e943f (ok)

[+] Valid IO Prox ID found!```