Proxmark3 developers community

Research, development and trades concerning the powerful Proxmark3 device.

Remember; sharing is caring. Bring something back to the community.


"Learn the tools of the trade the hard way." +Fravia

You are not logged in.

#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

Offline

#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?

Offline

#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?

Offline

#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.

Offline

#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?

Offline

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

marshmellow
Moderator
From: US
Registered: 2013-06-10
Posts: 2,299

Re: proxEntry - Help to decode

I can't get the link to work.

Offline

#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.

Offline

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

marshmellow
Moderator
From: US
Registered: 2013-06-10
Posts: 2,299

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).

Offline

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

marshmellow
Moderator
From: US
Registered: 2013-06-10
Posts: 2,299

Re: proxEntry - Help to decode

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

Offline

#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.

Offline

Board footer

Powered by FluxBB