We tried it then and it couldn't have been easier, logging in while connected to your home network flips the switch based on IP address or MACaddress, and then it worked at home or on the go, no password necessary.
In this case, the cyber identity of this file would be a full set of its cyber coordinates in the IP subspace: the computer IP address, its MACaddress, a Port number associated with the particular application, and the file name would constitute the full set of cyber coordinates, singularly identifying a cyber object (our file) in cyberspace.