A system, apparatus, and method in a communication system allow sharing contents of users by acquiring an access right even if there is no connection relationship in a Social Network Service (SNS). The system includes an SNS provider and a middleware server. The SNS provider provides the SNS and generates an authorization key and an authorization token according to an open authorization protocol. The middleware server obtains contents of a second user from the SNS provider by using an authorization key of the second user when a first user requests sharing SNS contents of the second user, and transmits the contents of the second user to the first user.