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Contributor

Registered: 2018-07-25

Posts: 9

GUNNEBO Electronic Security Card

Hi, I'm trying to read a contactless card, but no luck so far.
The only reference on it is "GUNNEBO Electronic Security"
It is a regular shape white card.
It has a magstripe on it, but is used in a contactless manner for access control.
Both

lf search u

and

hf search

returns nothing.

[usb] pm3 --> lf search u
[=] NOTE: some demods output possible binary          
[=] if it finds something that looks like a tag          
[=] False Positives ARE possible          
[=]           
[=] Checking for known tags...          
[=]           
[-] No data found!           
[=] Signal looks like noise. Maybe not an LF tag?                   
          
[usb] pm3 --> hf search
[=] Checking for known tags...          
[|] done                                      
[-] No known/supported 13.56 MHz tags found   

Even

hw tune

doesn't seem to show a voltage drop
Without the card:

[usb] pm3 --> hw tune
          
[=] Measuring antenna characteristics, please wait...
          
[=] You can cancel this operation by pressing the pm3 button          
..
          
[+] LF antenna: 69.11 V - 125.00 kHz          
[+] LF antenna: 32.43 V - 134.83 kHz          
[+] LF optimal: 69.11 V - 125.00 kHz          
[+] LF antenna is OK  
          
[+] HF antenna: 43.62 V - 13.56 MHz          
[+] HF antenna is OK           
          
[+] Displaying LF tuning graph. Divisor 88 is 134.83 kHz, 95 is 125.00 kHz.

And with the card:

          
[usb] pm3 --> hw tune
          
[=] Measuring antenna characteristics, please wait...
          
[=] You can cancel this operation by pressing the pm3 button          
..
          
[+] LF antenna: 69.11 V - 125.00 kHz          
[+] LF antenna: 32.43 V - 134.83 kHz          
[+] LF optimal: 69.11 V - 125.00 kHz          
[+] LF antenna is OK  
          
[+] HF antenna: 43.90 V - 13.56 MHz          
[+] HF antenna is OK           
          
[+] Displaying LF tuning graph. Divisor 88 is 134.83 kHz, 95 is 125.00 kHz.

I'm pretty much stucked here.

Ideas ( please )?

Hw version:

[usb] pm3 --> hw version

 [ Proxmark3 RFID instrument ]           

 [ CLIENT ]           
  client: RRG/Iceman          
  compiled with GCC 7.4.0 OS:Linux ARCH:x86_64          

 [ PROXMARK3 RDV4 ]           
  external flash:                  present           
  smartcard reader:                present           

 [ PROXMARK3 RDV4 Extras ]           
  FPC USART for BT add-on support: absent           
          
 [ ARM ]
  bootrom: RRG/Iceman/master/7c33eeb7 2020-01-19 16:04:37
       os: RRG/Iceman/master/7c33eeb7 2020-01-19 16:04:48
  compiled with GCC 7.3.1 20180622 (release) [ARM/embedded-7-branch revision 261907]

 [ FPGA ]
  LF image built for 2s30vq100 on 2020-01-12 at 15:31: 2
  HF image built for 2s30vq100 on 2020-01-12 at 15:31:16          

 [ Hardware ]           
  --= uC: AT91SAM7S512 Rev A          
  --= Embedded Processor: ARM7TDMI          
  --= Nonvolatile Program Memory Size: 512K bytes, Used: 279845 bytes (53%) Free: 244443 bytes (47%)          
  --= Second Nonvolatile Program Memory Size: None          
  --= Internal SRAM Size: 64K bytes          
  --= Architecture Identifier: AT91SAM7Sxx Series          
  --= Nonvolatile Program Memory Type: Embedded Flash Memory  

Last edited by www (2020-01-22 11:55:21)

iceman

Administrator

Registered: 2013-04-25

Posts: 9,538

Website

Re: GUNNEBO Electronic Security Card

doesn't seem to make voltage drop.  Maybe a UHF card?

www

Contributor

Registered: 2018-07-25

Posts: 9

Re: GUNNEBO Electronic Security Card

Thanks for your kind reply
UHF cards?
Do you have a reference?
EPC Class1 Gen2?

their webite talks about "ISO 14443 cards"
http://smartintrusions.com/wp-content/uploads/2015/11/Readers-Cards_Datasheet_ENG.pdf