Facebook is more popular than ever and the new features available on Facebook are opening new windows for vulnerabilities that everyday users may not be aware of.  A compromised facebook account could be a backdoor to more serious attacks on email or banking.

Here are 10 things to consider when using facebook….

1. Stop posting your phone numbers. Remember that your number is exposed to your friends, and therefore you’re relying on their security practices as well as your own to protect you. If a phisher can spoof your number, they have an extra layer of authenticity in convincing your friends you are in trouble and need money.
2. Put down the games. I know the Mafia can’t take Cuba without you, but it’s time to stop. The top games on Facebook have been hacked, and it’s just a matter of time before the one you play is next. It’s arguable that the damage is already done with the games and applications you’ve already allowed, but don’t sign up for any new ones! Third party apps are not guaranteed to be secure, and you should not trust them with your credentials. Here is a post I wrote last week on face book applications.
3. Don’t trust chat. The chat feature on Facebook should be treated as a public conversation.
4. Never give out any private information, even if you’re positive you are talking to your friend. Refresh your personal info. Take a fresh look at your profile from the perspective of a social engineer. Does your profile tell a story about you? What information can you cut out? Many security questions ask about personal details about primary school and pets. Delete any photos or profile details that may relate to those kinds of questions.
5. Don’t use the lazy emails. Facebook will fill your email inbox with notifications, and the links to easily respond. Instead of following the links in email, open up a fresh tab and go to facebook.com directly. Facebook and most social networks are targets for email spoofing. Otherwise you’ll be entering your login password at facebock.com!
6. Don’t friend acquaintances. Think of the friends list as a circle of trust. If you don’t know the person well enough to trust their security savvy, than you’re very unlikely to recognize the behavior of a phisher pretending to be them. 500 friends means 500 possible inroads to a social engineering or phishing attack. Tone down the number.
7. Don’t keep an old password! Changing your password short circuits many trivial forms of attack. Facebook is a high risk target for Identity Theft, especially if you’re using applications frequently. How about doing it now!
8. Photos are forever. Make it clear to your friends and family that you do not want those pictures of you in your birthday suit on anyone’s profile. (As opposed to the one of you in a suit on your birthday!) Pictures give behavioral information to an attacker. Bruce Schneier calls this “incidental data” in his Taxonomy of Social Networking Data. There he makes the assumption that incidental data is information that you did not create about yourself, and therefore do not control. I would add that although much of it is outside your control, there are ways to influence your friend’s posting behavior overall. Also, Facebook gives users the ability to “untag” themselves in pictures. While the damage is already done in the short term, you’ve influenced long term vulnerability.
9. Don’t forget @mentions. This new feature brings more incidental data. Be respectful of your neighbor’s privacy. Ask yourself if having a friend’s entire profile pinned to your comment like a big arrow is actually necessary for the joke to be funny.
10. Don’t trust other websites. Facebook is everywhere now. The same trust rules apply to the Facebook Login feature that is spreading to other websites. If you don’t trust the website you’re on, then signing in with the Facebook credential does not give you an added layer of protection, but rather hands your password to strangers.