Sophos says Google’s free blog hosting service has more malware than any other single site on the Web, with 2 percent of all the world’s dangerous code — both in hacker-created blogs and in innocent blogs infested with malicious comments. Google says hosting any malicious code is, of course, a violation and something its staff actively works to avoid.

Another curious discovery: Messages claiming to contain naked photos of Angelina Jolie or Nicole Kidman are the most common forms of e-mail-based malware, Sophos found.

Overall, Sophos says there are now 11 million different pieces of malware floating around, with 20,000 new samples coming in daily. Engineers say they’re finding three times the amount of problematic content as they did last year.

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