Today facebook is one of leading social networking site. It was launched in February 2004, owned and operated by Facebook, Inc. Today facebook has millions of users, which is a milestone for any company plying its trade on the Internet.

Facebook has evolved rapidly from a raw social networking website into a billion dollar company in a short span of time.

Facebook hosts valuable data of all its active users, which pertains to their personal details, contact details, geographic details, and other information related to interests, hobbies, and favourite hangouts.

If you’re not already particularly picky about who you friend on Facebook, you might want to think about rejiggering those privacy settings. It's not the backdoor access that the FBI has been pushing for, but US District Judge William Pauley III has now ruled that it and other law enforcement agencies are entitled to view your Facebook profile if one of your "friends" gives them permission to do so.