What satisfiable criteria would you like in a source?
Read the sources carefully. It all boils down to "US officials says so". It's different from the Podesta hack as forensic evidence were published linking Russian hackers to the attack.
alt Hacker News
Read the sources carefully. It all boils down to "US officials says so". It's different from the Podesta hack as forensic evidence were published linking Russian hackers to the attack.