A few days ago, a blogger Nik Cubrilovic said that Facebook’s new API’s allows applications to post messages on the new Timeline, without users’ intervention.Nik explains that this new API is an extension of Facebook Instant, “frictionless sharing” and although if you might think Logging-Out will save you, it appears it doesn’t and you can end up sharing you don’t want to.LinkNik Cubrilovic showed that when you logout from your Facebook account, cookies are not removed but altered.Even so each time when he visited Facebook(from his logged out account) through Like plugins or other widgets, information were still sent to Facebook. Having a 10-15 years experience in Security, Nik tried to get in touch with Facebook several times, but he had no response from them. The only way to prevent this problem will be to “delete all Facebook cookies” each time a Log Out action is performed.
Facebook responded, saying that they are not having view on anyone across the web and they just keep cookies to personalize, help and improve what they are doing or for safety and security. According to Facebook, these cookies are deleted within 90 days.
Although Facebook comments, they made a slight change and they decided to delete history called a_user is destroyed when the Logout action occurs. Unfortunately, some other cookies remain intact and they will still view users activity each time they will come on Facebook. If you don’t want to transmit this information to Facebook, make sure you delete your cookies after you Logged Out from Facebook.
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