Marvelous growth within the quality of on-line social networks (OSNs) in recent years. Most of existing on-line social networks like Face book & Twitter area unit designed to bias towards data speech act to an outsized audience and additionally raises variety of privacy and security problems. Though OSNs permits one user to limit access to her/his knowledge, presently they are doing not give any mechanism to enforce privacy considerations over knowledge related to multiple users. During this paper, we tend to propose associate approach to facilitate cooperative privacy management of shared knowledge in OSNs. we tend to extend and formulate a multiparty access management model, named Evidence based aggregation method to capture the essence of voting in OSNs, beside a multiparty policy specification theme and a policy social control mechanism. We tend to additionally demonstrate the relevancy of our approach by implementing a proof-of-concept example hosted in Face book
