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#1 2013-03-26 20:04:38

fullyto
Member
Registered: 2013-03-26
Posts: 2

Reader trace but Not tag trace

i have a proxmark3 with:
bootrom: svn 412
os: svn 412
FPGA image built on 2009/12/8

and a reader ACR1281U

when i try to snoop whit command "hf 14a snoop" and then "hf 14a list", i get the next trace:
ETU            rssi         who          bytes
+   0                                          52
+   1175                                     52
+   211324                                 52
+   1176                                     52
+   211324                                 52
+   1176                                     52
+   211326                                 52
+   1928                                     93  70  26  15  0f  3a  06 40 4b 
+   1176                                     52
+   1928                                     93  70  26  15  0f  3a  06 40 4b 
+   1176                                     52
+   1928                                     93  70  26  15  0f  3a  06 40 4b 
+   1176                                     52
+   1928                                     93  70  26  15  0f  3a  06 40 4b 
+   1176                                    52
+   211476                                 52
+   211476                                 52
+  211476                                  52
+   211476                                 52
+   211476                                 52
+   211476                                 52


I can't see any TAG trace. I tried changing distances btw reader/antenna/tag and it doesn't work... sad

Any ideas?

Thank you!

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#2 2013-03-26 21:12:19

rule
Member
Registered: 2008-05-21
Posts: 417

Re: Reader trace but Not tag trace

Try an antenna with better tuning values. If nothing works, just simulate the tag and see what the reader communicates to you.

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#3 2013-04-10 16:00:21

fullyto
Member
Registered: 2013-03-26
Posts: 2

Re: Reader trace but Not tag trace

i tried whit two different antennas, (tuning values: 11,28v and 10.09v) but i continue without tag trace.

simulating the tag, i get: Reader requested we HALT!

is it possible that the reader block tag trace when snooping?

i don't have idea of what it's wrong...

Thanks

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