In {HEAD ~ another embodiment}, {TAIL ~ a protection system} is provided for protecting data of variable protection levels 
In { HEAD ~ another embodiment } , { TAIL ~ a protection system } is provided for protecting data of variable protection levels
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH