The 6th International Conference on Security of Information and Networks (SIN 2013) provides an international forum for presentation of research and applications of security in information and networks. SIN 2013 features contributed as well as invited papers, special sessions, workshops, and tutorials on theory and practice. Its drive is to convene a high quality, well-attended, and up-to-date conference on scientific and technical issues of security in information, networks, and systems. One day before the conference is reserved for Workshop and Tutorial proposals, if any. Main conference days are November 26-28, 2013. Conference days are reserved for invited talks by keynote speakers, presentations of contributed papers, special sessions, and social program. Pre- and post-conference social programs will be available as well.