Why Russian hackers, not a lone wolf, were likely behind the DNC breach

A lone hacker named Guccifer 2.0 has tried to take credit.

Proving who pulled off a cyber attack is never easy and sometimes impossible. That’s the reality investigators face as they try to figure out who breached the network of the Democratic National Committee, which revealed last week that hackers had made off with confidential documents including research on Republican presidential opponent Donald Trump.

Russia was fingered as the likely suspect, until a hacker calling himself Guccifer 2.0 stepped up and claimed that he acted alone. But despite what appear to be DNC documents posted by Guccifer online, some security experts remain convinced that a group of skilled Russian hackers was behind the attack – likely acting on behalf of the Russian government. Here’s why they think that: