Proxmark3 community

quelqun

Member

Registered: 2014-04-03

Posts: 4

Em410x

Hello everyone, I'm new to PM3 ! First, thank all of you for you great work!
I'm interested in RFID technology since 3 years now but recently I launch myself on this project (PM3).
I see that PM3's project is on git and I found many documentation!
I've bought the PM3 and i'm now able to play with it a little bit.

I'm trying to extract the ID of an EM410x card and replay it.
To do this, I use em410xwatch with h option (I'm able to read the tag's ID at 125 khz but it is hard, at 134 khz reading is really faster and better)

I've got two questions:

- Why is there 2 ID when I read the tag ?
I've read the datasheet (http://rsmart.com.cn/datasheet/chip_cl/EM4100_DS.pdf) and I can't see where is the second ID.

- I want to simulate the tag at 134 khz (already done with em410xsim but the reader I would like to test read at 134 khz), how to do this ?
I have already try to change the divisor of LF antenna but without results. (I've got  the "latest compiled stand-alone Windows version" (http://www.proxmark.org/forum/viewtopic.php?id=1562  -> great post, thanks !!))

Thanks !!

midnitesnake

Contributor

Registered: 2012-05-11

Posts: 151

Re: Em410x

What do you mean?

Do you mean something similar to this example:
EM410x Tag ID: 11008f0d4a         
Unique Tag ID: 88001f0b25

Unique tags use exactly the same data sheet as EM410x - just the data-bits are read in the opposite order.  Instead of implementing additional repetitive code, it just made sense to include the second bit-order, this way if there are any markings on the card its easier to straight away tell if its an EM41x or Unique.

quelqun

Member

Registered: 2014-04-03

Posts: 4

Re: Em410x

Thanks you very much for your answer!
Your exemple is a good description.
I was thinking that EM410x had 2 ID now i know that is two differents tag

Any way to simulate at 134 khz ?

Thanks

midnitesnake

Contributor

Registered: 2012-05-11

Posts: 151

Re: Em410x

Sorry, can't help you on 134kHz simulation, Ive only seen EM41x at 125kHz, and cloned a card with T5577.

Hopefully, someone else on here can answer your simulation question.

quelqun

Member

Registered: 2014-04-03

Posts: 4

Re: Em410x

I've check source code of PM3 Em4x simulation but I can't see where and how I can add something to simulate at 134khz.
If anyone can help me, feel free to to it

Thanks!