Social networks have gained unprecedented popularity recently, and more social networks have emerged for specific purposes. People create information in social network. The process of information creation involves many human interactions such as tagging, selecting and grouping Human interacted data creation assigns abundant semantic to data. Multiple attributes have been added to data upon data creation. Some of these attributes are related to resource access control policy. A social network may not want its information open totally, therefore, each social network has to have its own resource access policy. This paper proposes an architecture for users to share information cross social networks in a secure, effective and efficient way. The proposed architecture also let social network decide which kind of information to be shared. The proposed architecture provides an attribute-based information sharing mechanism for collaborative social networks to share their information.