Windows 7: New Twitter Feature Looks For Malicious URLs.

Twitter has added a new service that detects malicious URLs in an effort to quell the rise in spam and phishing on the microblogging social network.

The new security feature ultimately will scan all URLs before they hit the Twitter feed, but initially is only doing so for URLs sent via Twitter direct messages [DMs] and email notifications about DMs. Twitter is using its own URL shortener for these links: "For the most part, you will not notice this feature because it works behind the scenes but you may notice links shortened to twt.tl in Direct Messages and email notifications," said Del Harvey, Twitter's director of trust and safety, in a blog post last night.

Twitter's security feature comes amid new data revealing the level of abuse on the social network: One in eight Twitter accounts last year was malicious, suspicious, or suspended, according to a report issued today by Barracuda Networks. The surge in celebrities joining Twitter in 2009 resulted in a major jump in spam, phishing, and other abuse on the site, according to the report.