The firm's survey found that spamming on social networks has skyrocketed more than 70 percent. Fifty-seven percent of social-networking users said they had been spammed via a social-networking site.
In addition, 36 percent of respondents said they had received malware from such sites, a spike of almost 70 percent.
"Computer users are spending more time on social networks, sharing sensitive and valuable personal information, and hackers have sniffed out where the money is to be made," said Graham Cluley, senior technology consultant for Sophos. "The dramatic rise in attacks in the last year tells us that social networks and their millions of users have to do more to protect themselves from organized cybercrime or risk falling prey to identity-theft schemes, scams and malware attacks."
As the biggest social network, Facebook is also the "most feared" network, Sophos said. Sixty percent of respondents said Facebook is the biggest security risk, with MySpace a distant second at 18 percent. This has little to do with the relative security measures of the sites and everything to do with size, Cluley said.
"We shouldn't forget that Facebook is by far the largest social network -- and you'll find more bad apples in the biggest orchard," explained Cluley. "The truth is that the security team at Facebook works hard to counter threats on their site -- it's just that policing 350 million users can't be an easy job for anyone."
Cluley did call for Facebook to make some changes, however. "There is no doubt that simple changes could make Facebook users safer. For instance, when Facebook rolled out its... [ Full story from CRM Daily ]