“Russia” hacked the election .. How do we know? Because “they” left behind “their” fingerprints ..
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“With UMBRAGE and related projects the CIA cannot only increase its total number of attack types, but also misdirect attribution by leaving behind the ‘fingerprints’ of the groups that the attack techniques were stolen from”
WikiLeaks: CIA hacking group ‘UMBRAGE’ stockpiled techniques from other hackers
Practice would have allowed CIA to leave behind ‘fingerprints’ of other groups.