The recent development in computer network has enabled a rich set of Internet services and applications such email, online social networks (OSNs), and microblogging systems that are now a very important part of our daily lives. Many computer networks have dual properties. They are physical networks and at the same time human networks. It is tremendously important to exploit this social networking feature to design more efficient and more reliable communication systems.
In this talk, I will illustrate, with several examples, how social networks can be integrated into system design. I will start by introducing several human mobility and social contact experiments with diversified scenarios and presenting two important social metrics, community and centrality, commonly observed in the experiments. Next, I will talk about how these social metrics can be applied to forwarding in opportunistic mobile networks, design of spam protection systems, scaling up of microblogging services, mobile data offloading for cellular networks, cyber-insurance, and recommendation systems.