modifying the directory manager file by deleting a reference to {TAIL ~ the target file}, wherein the reference includes {HEAD ~ a target file encryption key}; and 
modifying the directory manager file by deleting a reference to { TAIL ~ the target file } , wherein the reference includes { HEAD ~ a target file encryption key } ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH