Cyber identity is determined by a full set of coordinates in a particular subspace.

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It is an object in the IP subspace.

FORBES: Cyber Security Fails As 3.6 Million Social Security Numbers Breached In South Carolina

In subspace, this is not true.

FORBES: Cyber Security Fails As 3.6 Million Social Security Numbers Breached In South Carolina

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.

FORBES: Cyber Security Fails As 3.6 Million Social Security Numbers Breached In South Carolina