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Hello, i tried to sniff the communication between my acr 122 and the PM3.
But i can't get the tag challenge?
Any ideas???
Thanks
Here is what i get :
+ 64: 0: TAG 04 00
+ 683: : 93 20 SELECT
+ 63: 0: TAG 45 b4 49 7a c2 TAG SPEAKING
+ 1986: : 93 70 45 b4 49 7a c2 58 5f SELECT WITH UID
+ 62: 0: TAG 88 be 59 TAG TYPE
+ 8804: : 50 00 57 cd AUTH (block 00) Tag challenge (nt, "Nonce Tag") ?????
+1452108: : 52
+ 64: 0: TAG 04 00
+ 1483: : 93 70 45 b4 49 7a c2 58 5f
+ 63: 0: TAG 88 be 59
+ 189454: : 52
+ 13112: : 52
+ 66: 0: TAG 04 00
+ 1480: : 93 70 45 b4 49 7a c2 58 5f
+ 64: 0: TAG 88 be 59
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50 00 is a halt, not authentication. You should have 60/61 ... for key A/B authentication.
I'm not sure if the second trace you have there is a continuation but the PCD is sending 'wake up's and PICC is responding with underflows. It looks like your communications got out of sync.
If you're sniffing, it looks like an antenna issue.
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