Abstract:
In the era of Internet technologies, social networking websites has witnessed thriving popularity. Computer mediated communication has changed the rules of social interaction and communication. Most social networking sites like Orkut, Facebook, Google+, Twitter etc. facilitates user’s with the features like online interaction, sharing of information and developing new relationships etc. Online interaction and sharing of personal information in social networking sites has raised new privacy concerns. So, it requires an exploratory insight into user’s behavioural intention to share information. The task resource manager is to identify better method to provide effective protection to improve security. This paper analyses security and privacy issues in social networking sites. The main aim is to enhance the user security and privacy which is the most important for the social network services. This paper is a survey which is more specific to exposes the social networks service models and issues in in network environment with respect to enhancement of security.

Keywords: Social Network, Security, privacy,Quality of Service(QoS)and Security Mechanism