The heuristics 530 may advantageously address {HEAD ~ circumstances} surrounding an authentication attempt, such as, for example, the time of day, {TAIL ~ IP address} or subnet mask, purchasing profile, email address, processor serial number or ID, or the like 
The heuristics 530 may advantageously address { HEAD ~ circumstances } surrounding an authentication attempt , such as , for example , the time of day , { TAIL ~ IP address } or subnet mask , purchasing profile , email address , processor serial number or ID , or the like
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH