{HEAD ~ A set} of security requirements defining protocols for implementing commercial transactions over the shared network using instruments identified with the payment processing organization is received from each of a plurality of {TAIL ~ payment processing organizations} 
{ HEAD ~ A set } of security requirements defining protocols for implementing commercial transactions over the shared network using instruments identified with the payment processing organization is received from each of a plurality of { TAIL ~ payment processing organizations }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL