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A comment on Secret Code in Color Printers Lets Government Track You (2005). Parent comment

Re:Secret Code in Color Printers Lets Government Track You (... by numeromancer on Wednesday October 21, 2015 @08:03AM (#10424863)
Such tracking was famously used in the Alger Hiss case:

https://en.wikipedia.org/wiki/Alger_Hiss#Fake_typewriter_hyp...

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