Answer: In each person's home directory there is a folder called
"dropbox". This is the only place you can copy a file to in another
person's directory. Anyone will be able to see the name, but not the
contents, of all files in a drop-box. This allows the person copying a
file into a drop-box ensure the copy was successful, but prevents anyone
else from reading or manipulating the file. The drop-box is the only
public space in secure folders. All other folders within a folder can
only be seen by the folder's owners.
