wherein receiving the security classification information comprises receiving first aggregated security classification information that identifies a first mapping between a first security class and {TAIL ~ a first set} of computing devices and receiving second aggregated {HEAD ~ security classification information} that identifies a second mapping between a second security class and a second set of computing devices, 
wherein receiving the security classification information comprises receiving first aggregated security classification information that identifies a first mapping between a first security class and { TAIL ~ a first set } of computing devices and receiving second aggregated { HEAD ~ security classification information } that identifies a second mapping between a second security class and a second set of computing devices ,
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 OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH