Proxmark3 community

hheile

Contributor

Registered: 2014-03-03

Posts: 35

Tag unknown

Hi all,

today i run again to a tag with no luck to get any information about it.
So, what kind of card is it:

Parking Card from local Parking agency.
Some things:

i only need to hold the card infront of the reader. it takes some seconds (a lot of seconds) then it will be recognized by the system. i am sure the data is hold in a database in backround.

so i try to identify the tag just to see what kind it is. very ineresting that there is no voltage drop when i put the card on the reader with hf antenna and use hw tune.

i think its lf, because a little drop is visible, but this is all i have.

any idea how to go any further now for analyzing?

here is the output:

proxmark3> hw tune
#db# Measuring antenna characteristics, please wait...                 
#db# Measuring complete, sending report back to host                 
         
# LF antenna: 14,90 V @   125.00 kHz         
# LF antenna: 20,41 V @   134.00 kHz         
# LF optimal: 25,78 V @   130,43 kHz         
# HF antenna:  0,93 V @    13.56 MHz         
# Your HF antenna is unusable.         
proxmark3> hw tune
#db# Measuring antenna characteristics, please wait...                 
#db# Measuring complete, sending report back to host                 
         
# LF antenna:  7,92 V @   125.00 kHz         
# LF antenna: 11,14 V @   134.00 kHz         
# LF optimal: 17,05 V @   142,86 kHz         
# HF antenna:  0,93 V @    13.56 MHz         
# Your HF antenna is unusable.         
proxmark3> hw tune
#db# Measuring antenna characteristics, please wait...                 
#db# Measuring complete, sending report back to host                 
         
# LF antenna:  7,92 V @   125.00 kHz         
# LF antenna: 10,88 V @   134.00 kHz         
# LF optimal: 17,19 V @   141,18 kHz         
# HF antenna:  0,97 V @    13.56 MHz         
# Your HF antenna is unusable.

best

midnitesnake

Contributor

Registered: 2012-05-11

Posts: 151

Re: Tag unknown

commands

lf read
data samples 20000
save <filename>

host the saved file on a free upload site/dropbox, and maybe we can help you out?

hheile

Contributor

Registered: 2014-03-03

Posts: 35

Re: Tag unknown

hi midnitesnake,

its done, uploaded to wetransfer: http://we.tl/4tSn3FeoxU

thanks in advance

hheile

Contributor

Registered: 2014-03-03

Posts: 35

Re: Tag unknown

and another one:
http://we.tl/Fp0vGnUeiy

the first one is a card which is not limited and not something like prepaid

the second one is  a card which is definetly a prepaid card (for now 20 Euros on it)

both cards seems to be provided by skidata, i found it in the referenz-list:
http://www.skidata.com/en/business-areas-installations/parking-operators.html#tabs1-2

midnitesnake

Contributor

Registered: 2012-05-11

Posts: 151

Re: Tag unknown

hmmm, I dont recognise the format of either dump sorry.

But the waveform looks like it can be either manchester or ASK demodulated, think it requires more investigation and possibly more eyes analysing it.

Last edited by midnitesnake (2014-05-23 18:13:59)

hheile

Contributor

Registered: 2014-03-03

Posts: 35

Re: Tag unknown

hi midnitesnake, thanks anyway.
this will be the "next" challenge, because they provide a lot of cards everywhere

johnthewave

Contributor

Registered: 2014-10-10

Posts: 19

Re: Tag unknown

Hello,

It is possibly Electronic Marin EM4450.
Did you make any progress on this  ?