Excerpts from "Are the Clinton WikiLeaks emails doctored, or are they authentic?"
It’s possible to verify the legitimacy of some, but not all, of the emails, cybersecurity experts said. So we can’t definitively say
none of the thousands of leaked emails, which came from campaign chair John Podesta's account, have been doctored...
"I've looked at a lot of document dumps provided by hacker groups over the years, and in almost every case you can find a few altered or entirely falsified documents," said Jeffrey Carr, CEO of cybersecurity firm Taia Global. "But only a few. The vast majority were genuine. I believe that's the case with the Podesta emails, as well."
Experts pointed to the Democratic National Committee email hack that happened earlier this year. Metadata from the stolen and leaked documents showed the hackers had edited documents. For example, hackers were kicked out of the DNC network June 11, yet among their documents is a file that was created on June 15,
found Thomas Rid, a war studies professor at King’s College London.
A few weeks later, Guccifer 2.0, the hacker believed to have Russian ties, released documents supposedly stolen from the Clinton Foundation. But security analysts reviewed the documents and
found that they actually came from the DNC hacks, not the foundation. And some of the information was likely fabricated, like a folder conspicuously titled "Pay to Play."
...digital signatures are embedded in the raw sources available on the WikiLeaks website and can be used to "concretely prove that many of the emails in the Wikileaks dump are undoctored," said cybersecurity consultant Matt Tait. However, some of the emails in the WikiLeaks dump — especially among emails sent to Podesta — don’t have these signatures and can’t be technically verified. And digital signature verification wouldn’t detect tampering by omission, like if the hackers were to withhold certain emails.
http://www.politifact.com/truth-o-m...inton-wikileaks-emails-doctored-or-are-they-/