The PST2013 International Conference on Privacy, Security and Trust (PST) is being held in Tarragona, Catalonia, July 10-12, 2013. PST2013 is the eleventh such annual conference focusing on PST technologies. PST2013 provides a forum for researchers world-wide to unveil their latest work in privacy, security and trust and to show how this research can be used to enable innovation. PST2013 is organized by UNESCO Chair in Data Privacy and Universitat Rovira i Virgili (URV). The IEEE Computer Society is the conference technical co-sponsor.