The study examined predictors of privacy protection behavior on Facebook. It found that trust in one's Facebook friends, rather than trust in Facebook as a platform, better predicted users' privacy behaviors. Specifically, lower trust in one's friends correlated with more frequent use of privacy protection strategies on Facebook, such as restricting profile access, deleting unwanted photos, and providing false information. Additionally, having a larger number of Facebook friends, who are more difficult to predict, related to greater privacy protection efforts. The study concluded that trust in friends, rather than the platform, is an important new issue influencing Facebook users' privacy behaviors.