Given the storm of bad press and user revolts Facebook has been suffering since announcing their “Open Graph” feature to better spread its data across the web, it’s rather puzzling that the company would announce an unrelated new security feature. But, announce it they did. With well-known tech pundit and podcaster Leo Laporte deleting his Facebook account on-the-air, Facebook has announced a new security method that ties your account to certain known computers and devices.

Similar to a method already in-use by most U.S. banking entities, Facebook will recognize computers and devices you typically log-in with, however when an unknown device attempts to log-in, you will be required to answer a challenge-response question to verify your identity. Facebook users will be able to approve which computers and mobile devices are allowed to log-in, and when an unauthorized attempt occurs, an email or text message will alert the user of the unauthorized access attempt.

While this heightened security is certainly unique in the social networking world, it does nothing to address the serious privacy issues being expressed about how Facebook data is being extended and used by unknown and potentially untrustworthy third-party web sites. Even Congress is getting involved, with four Democratic senators calling on Facebook CEO Mark Zuckerberg to reconsider the recent changes in its privacy settings and asking the Federal Trade Commission to streamline guidelines regarding privacy on all social networks.

After the jump, I describe how to activate Facebook’s new authorized device/log-in notification feature, so read on if you’d like to try it for yourself.

Facebook's "Open Graph" Concept

Facebook CEO Mark Zuckerberg announced a series of updates integral to their next-gen Facebook Platform today at their third annual f8 conference held in San Francisco. At the heart of these updates is the technology to allow Facebook data to flow more easily outside the carefully-controlled confines of Facebook itself.

Building on the success and widespread adoption of Facebook Connect, first announced at the inaugural f8 in 2008, a new concept dubbed “Open Graph” will expose your Facebook connections and public data to third-party web sites and mobile apps. In doing so, these outside services can better personalize your experience based on the data it finds. Expect the data to flow in two directions as services like Pandora, Yelp, Foursquare and other connected services feed even more behavioral data into your personal Open Graph.

You can easily imagine a scenario wherein after analyzing your Foursquare check-ins, Yelp decides that you really have a thing for Thai food and helpfully displays all of the Thai Restaurants in your immediate area upon start-up. Or perhaps you’ve favorited so many female singer-songwriter tracks at your favorite music-streaming service, that Yelp notifies you that Sara Barailles is playing at the Hotel Cafe nearby in Los Angeles this evening.

If you’re anything like me, you’re probably marveling at the glorious levels of personalization you might experience while simultaneously cringing at the potential privacy issues that Open Graph may unleash on unsuspecting users. But wait, there’s more!