Linking two excel sheets on different computers without sharing files

I have two excel sheets, both are linked. one is input sheet and another one is output sheet. the data entered in input sheet updates on output sheet automatically as both are linked (both sheets are in same folder on same computer). What I want is input sheet should be in one computer and output sheet in another, then how can I coect these sheets so that when I enter data in input sheet in one computer, output sheet automatically gets updated on another computer without sharing any files.