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Hi All !
Is there any ways to improve sensitivity of PM3 snoop mode ?
In our business rfid project we use Mifare 1K tags. When I try to sniff communications between reader and tag PM3 lists only reader data (rarely some Tag's bytes). I just never got full authentication sniff.
I use handmade HF antenna (seven 4-cm rings) "face to face" enclosed to Tag.
Without tag:
proxmark3> hw tune
#db# Measuring antenna characteristics, please wait.
# LF antenna: 0.00 V @ 125.00 kHz
# LF antenna: 0.00 V @ 134.00 kHz
# LF optimal: 0.00 V @ 12000.00 kHz
# HF antenna: 12.34 V @ 13.56 MHz
# Your LF antenna is unusable.
encosed the tag:
proxmark3> hw tune
#db# Measuring antenna characteristics, please wait.
# LF antenna: 0.00 V @ 125.00 kHz
# LF antenna: 0.00 V @ 134.00 kHz
# LF optimal: 0.00 V @ 12000.00 kHz
# HF antenna: 8.19 V @ 13.56 MHz
# Your LF antenna is unusable.
However "hf 14a list" gives me:
+ 1478: : 93 20
+ 2260: : 93 70 ff 82 1a e3 84 ec cf
+ 2096: : 61 23 b4 71
+ 220: 0: TAG 01 <- Here should be 4-bytes tag challenge, but only one byte...
+ 2523: : a7 7c ec 4e !crc
+ 198: 0: TAG a9 bf
+ 362: 0: TAG ab
+ 290: 0: TAG a5! 8b!
+ 1618: : 15 5b 58 57 !crc
OR only reader byes...
+ 1096: : 52
+ 1480: : 93 20
+ 2263: : 93 70 ff 82 1a e3 84 ec cf
+ 2094: : 61 23 b4 71
+ 1086: : 3b 27 15 f0 c3 42 ed 2d !crc
So I suppose that signal from Tag is too small to PM3 can use it...
How can I increase PM3 sensitivity ?
Can anyone help me, please.... Thanks !
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