Abstract
This research uses bibliometric citation network analysis over a large amount of academic literature, in order to clarify the knowledge structure in the field of security. The analysis comprises the growing of the knowledge structure of security for the years 2000, 2005, 2010 and 2015, mainly focusing on top 10 countries, organizations, and research themes. The results show that there has been a surge in research related to National Security and Cyber Security, which comprise the majority of academic papers in the field, revealing a tight structure that has become a major research area. The United States (US) has played the leading role in the field, by the number of organizations involved, however in recent years the influence of the US is in the middle of a declining process. On the contrary, the Chinese presence has increased.
