For the purposes of the present invention identity is preferably determined by {HEAD ~ means} of {TAIL ~ known computer programmes} using standard algorithms 
For the purposes of the present invention identity is preferably determined by { HEAD ~ means } of { TAIL ~ known computer programmes } using standard algorithms
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH