on-line social networks have practiced tremendous growth in recent years and become a factual portal for many ample web users. These on-line social networks supply enticing suggests that for digital social interactions and data sharing, however additionally move up variety of privacy and security problems. whereas on-line social networks permit users to manage access to shared knowledge, they presently don't offer any mechanism to enforce privacy concerns over knowledge related to several users. to the present finish, we have a tendency to propose associate approach to modify the protection of shared data related to multiple users in on-line social networks. we have a tendency to prepare associate access management model to require into custody the essence of multiparty authorization needs, beside a policy social control mechanism and a multiparty policy specification system. This paper we have a tendency to going study concerning model and mechanism systems in analysis of multiparty access management. The correctness of realization of associate access management model relies on the premise that the access management model is valid. pursue associate economical resolution to facilitate cooperative management of common knowledge in OSNs. we start by investigate how the dearth of multiparty access management for knowledge sharing in OSNs will undermine the protection of user knowledge. Some distinctive knowledge sharing patterns with relation to multiparty authorization in OSNs also are known. we have a tendency to build official a Multiparty Access management (MPAC) model for OSNs.