I Introduction
Privacy has broad historical roots: Aristotle made a distinction between the public sphere of political activity and the private sphere associated with domestic life. Nowadays privacy is usually defined as the “part of private life that one is able to protect from being observed or disturbed by other people.” The right of privacy is a permanent and genuine right of any person. The Privacy Rights Clearinghouse (PRC), a non-profit organization dedicated to protecting the privacy of American consumers, indicates Internet privacy threats, data profiling and wireless communications and location tracking among the current privacy threats. The importance of privacy is also reflected in the legislation. The first influential text was the United States Privacy Act [1] adopted by the Congress in 1974, whereas recently in 2012 the European Commission proposed a General Data Protection Regulation amending Directive 95/46/EC [2].