The system 1, wherein the challenge response server computer comprises a device information module configured to obtain {HEAD ~ information} on {TAIL ~ a device} used by the consumer to conduct the transaction 
on
The system 1 , wherein the challenge response server computer comprises a device information module configured to obtain { HEAD ~ information } on { TAIL ~ a device } used by the consumer to conduct the transaction
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH