maintaining the package identifier in a protected manner such that {TAIL ~ the package identifier} is accessible to an operating system of the device but not accessible to {HEAD ~ other applications} of the device 
maintaining the package identifier in a protected manner such that { TAIL ~ the package identifier } is accessible to an operating system of the device but not accessible to { HEAD ~ other applications } of the device
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH