«Because the NSA logs all printing jobs on its printers, it can use this to match up precisely who printed the document,» Robert Graham, a security expert, wrote for
the blog Errata Security.
As Robert Graham, founder and CEO of the security firm
Errata Security, demonstrated in a
blog post, someone appears to have printed the document on a printer with the model number 54 and the serial number 29535218 at a certain time on May 9, 2017.