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 MAC address, 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.
If you have a "reasonable" expectation of victimization because your information was breached or you already have been victimized, ask the IRS for an identity protection personal identification number, or IP PIN.