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Media Money with Julia Boorstin

With teens in mind, Facebook pushes both ways on privacy

Tech Yeah! Facebook privacy issues

Facebook has made a move that aims to protect against criticism that it's not protecting user privacy, while also giving users an option to embrace the opposite of privacy—very public posts.

Here's the privacy news: Facebook is instituting a new default privacy policy for teens 13-17 years old. Before now, that group had its default privacy access set to friends of friends, which allowed people they didn't know to read their posts and see their photos, unless they changed their settings. Now, the default setting is narrow—limited to friends—only people whom Facebook users have directly approved.

Here's the public news: Teens will also be able to post publicly on Facebook, and turn on a "follow" button so other people can follow their public posts, and have them show up in news feeds. While Facebook has built its billion-plus user business around sharing privately, with people you already know, the company is increasingly making a push to foster public conversation, like Twitter.

(Read more: Twitter Q3 results: Growing revenue and net losses)