In a report by security firm Websense, an alarming rise in the growth of malicious websites was identified in 2009 as compared to 2008 – almost 225 percent. The study also found an increased focus among hackers and spammers on targeting social media sites such as blogs and wikis. Social media or so-called Web 2.0 sites allow user-generated content, which can be a source of vulnerability. Researchers identified that up to 95 percent of user-generated comments to blogs, chat rooms, and message boards are spam or malicious – linking to data stealing sites or to downloads of malicious software. Email also continues to be a target for malicious activity with tens of thousands of Hotmail, Gmail and Yahoo! email accounts hacked and passwords stolen and posted online in 2009, which resulted in a marked increase in the number of spam emails.