Just what we needed: ANOTHER form of malware! This one has been called the porn virus.
A new trojan horse has appeared, from Japan. It masquerades as a game installation program, then grabs the target computer’s web browsing history, publishes it on its own website, and demands a payment to remove the browser history from that website. The BBC has done a good job of describing this example of ransomware, as well as ransomware associated with Koobface and Zeus (both are very bad news.): http://news.bbc.co.uk/2/hi/8622665.stm.