Even after tens of millions of people had online accounts hacked, many Internet users still rely on easily guessed passwords.
The Twitter account of the leader of Britain's main opposition party appeared to have been hacked Sunday, judging by bizarre tweets including one calling Prime Minister David Cameron a "pie".
With marketers creating online ads that are meant to blend in as real news stories, US regulators are trying to make sure Internet users are able to differentiate the two.
Facebook on Wednesday said it would block access to its website by non-members in Belgium, as it battles a court order to stop tracking Internet users who do not have accounts with the US social media giant.
Survivors of the Paris attacks seeking shelter and people worried about friends or families all took to social media overnight following a wave of attacks in the French capital that killed 128.
A Belgian court on Monday gave Facebook 48 hours to stop tracking Internet users who do not have accounts with the US social media giant or risk fines of up to 250,000 euros ($269,000) a day, a statement said.
China's blocking of Twitter has failed to keep activists, journalists and others from using the messaging platform to connect with the rest of the world, said a study released Wednesday.
Missouri University of Science and Technology researchers are working to build a framework to study the online behavior of Internet users and how that behavior affects the safety of systems and networks.
More than 80 percent of the 120 million Africans using Facebook access the site through their mobile phones, the social media group said Thursday.