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#1 2014-02-14 02:42:14

genexis
Contributor
Registered: 2014-01-25
Posts: 78

proxEntry - Help to decode

Hi all,

I've encountered another 125Khz card that has once again stumbled me.
It looks like a EM plot, but again i'm not able to decode it.
I have tried using askdemod 0, mandemod 32, but doesn't work.

Anybody care to help?

16k trace: http://www.filedropper.com/proxentry16k
prox_Entry_Card.jpg

prox_Entry_Plot.jpg

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#2 2014-02-14 08:57:33

midnitesnake
Contributor
Registered: 2012-05-11
Posts: 151

Re: proxEntry - Help to decode

Looks like an EM4100, probably can't decode it as the Manchester Demodulation routine is broken, I believe others are aware and are working on it; you could try reverting to an old version of the svn? might fix your decoding problems?

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#3 2014-02-14 08:59:06

genexis
Contributor
Registered: 2014-01-25
Posts: 78

Re: proxEntry - Help to decode

which version do you suggest?

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#4 2014-02-14 09:08:32

midnitesnake
Contributor
Registered: 2012-05-11
Posts: 151

Re: proxEntry - Help to decode

just tried v756 ; no luck ? maybe there is more to it?  but I have had recent problems with manchester decoding.

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#5 2014-02-15 05:24:01

genexis
Contributor
Registered: 2014-01-25
Posts: 78

Re: proxEntry - Help to decode

tried a couple of builds, no luck.

Anybody able to advise? marshmellow?

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#6 2014-02-17 15:14:32

marshmellow
Contributor
From: US
Registered: 2013-06-10
Posts: 2,302

Re: proxEntry - Help to decode

I can't get the link to work.

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#7 2014-02-17 15:24:41

genexis
Contributor
Registered: 2014-01-25
Posts: 78

Re: proxEntry - Help to decode

Try this: http://www.sendspace.com/file/mnacq2

I got to stop using filedropper. it deletes the file after a while.

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#8 2014-02-17 18:35:56

marshmellow
Contributor
From: US
Registered: 2013-06-10
Posts: 2,302

Re: proxEntry - Help to decode

interesting...  It is definitely not a EM4xxx format.  did you try the Hitag reader options? I read on their site they use Hitag as well as the T557x chips. I've never seen a plot quite like that though.   and there is no apparent repeating pattern.   it almost looks like it is an authentication string, (which would mean it is neither Hitag nor T557x).

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#9 2014-02-17 18:37:02

marshmellow
Contributor
From: US
Registered: 2013-06-10
Posts: 2,302

Re: proxEntry - Help to decode

could you take a second read and post it just to rule out a bad read?

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#10 2014-02-18 02:11:44

genexis
Contributor
Registered: 2014-01-25
Posts: 78

Re: proxEntry - Help to decode

Here is another one
http://www.sendspace.com/file/s0sg69

done with
lf read h
data sample 16000

I believe the readings are correct. I was worried that it is Hitag as well. I did read up about it in google, and most of the links points back to this forum, in which nobody has really cracked it yet.

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