In recent times, social networks have sprung up in society. Without a doubt, these systems provide a wide range of communication opportunities, but in turn pose significant risks to the privacy of its users and third parties who are not. In them, some personal data such as photographs can be accessed publicly and global, in a manner and in amounts never imagined, and people faced possible loss of control over your personal information and the way that third-you can use it once posted on the network. In media references to events related to these services, such as dismissals of workers after publishing certain personal information and opinions on social networks, cases of spoofing identity, or improper uses of the information published by users are quite frequent. In addition, we could know how one of the most popular social networks trying to take a turn in their use and privacy policies, in order to take over form indefinite dumps contents in it. One of our main challenges as guarantors of citizens data protection focuses on the expansion of systems that have led to an unprecedented level of disclosure of personal information.