Security experts have called Trump's Twitter account a "disaster waiting to happen."
Tillerson supported Ukraine's claim on Crimea but said he hadn't discussed Russia with Donald Trump.
"The Kremlin has no dirt on Trump," Vladimir Putin's spokesman said on Wednesday.
Sixteen key questions for Trump's CIA pick Mike Pompeo
Trump says Assange is right, "Russians did not give him the info!"
A group considered responsible for U.S. Democratic Party hacks used an Android malware implant to track troops.
Officials said Putin wanted to create the image that the U.S. could no longer be a "credible global leader."
The Russian president's spokesman took a swipe at claims Moscow interfered in the U.K. vote.
How will Trump respond to the Russian hack attack?
Details of up to 412 million people have been exposed following hack of "sex hookup" site Adult Friend Finder.
Rostec says it logged thousands of suspicious cyber-incidents last year.
Brazile passed information to the Clinton campaign before a debate in Flint, Michigan.
An FBI-supported operation arrested a Russian in Prague linked to cyberattacks on the U.S.
Philipp Kirkorov is backing Trump and is no stranger to Vladimir Putin either.
A simulated phishing scam found that people click on unknown links out of curiosity.
The social media pages of Ukraine's security forces were hijacked on Independence Day.
Wikileaks and others claim censorship after removal following release of DCCC contact numbers, passwords.
Online giveaway of bitcoins prompts speculation of elaborate money laundering scheme.
Intelligence agencies specialize in the manipulation of information, and Russia's are good at it.
The majority of Russians however do not know who Trump is exactly.