The most widely used notion of privacy is that of control over personal information. The importance of social network sites and serviceshave been increasing since some years. The introduction of ubiquitous systems, wearable computing and “Internet of Things” technologies in our digital society results in a large-scale data generation. In the same time there were an increasing number of socially intelligent agents who gather, manage and maintain the data. In this paper we will focus on two aspects: the location and user modeling. We learn about some techniques or methods used for providing privacy to the users. These methods are interesting, but not perfect. It’s why we also take a look semantic-based methods, in order to have more reliable methods providing privacy.