Online Social Networks (OSNs) offer an attractive mean for digital social interactions and information sharing among the users. At the same time, it raises a number of security and privacy issues. Especially, there is no efficient mechanism to enforce privacy over data associated with multiple users. This paper proposes a privacy preserving mechanism to allow the users to control access of their shared resources in a collaborative manner. We have developed a Facebook application "insecure" and made a 'survey based user study' of the app with a user base of (n = 50). The results of the study reveals popularity of it among users. The study indicates that users are still concerned about the privacy of their shared contents and they believe that a tool like "insecure" could be useful for managing their shared images and other shared contents.
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