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