The book "Policies and Research in Identity Management" offers a comprehensive analysis of the challenges and developments in the field of identity management in the 21st century. In light of the increasing global threats posed by crime and terrorism, both physical and online, the need for effective identification and access control methods is becoming more urgent. At the same time, these security measures must be balanced with the protection of users' privacy. The book reflects the interdisciplinary approaches promoted by the IFIP Working Group 11.6 in this area and provides a valuable exchange of knowledge between scholars and practitioners from various sectors. The content is based on the discussions and insights from the first IDMAN 2007 conference, which focused on national identity management in the public sector. The editors, Elisabeth de Leeuw, Simone Fischer-Hübner, Jimmy C. Tseng, and John Borking, combine their expertise to inform readers about the latest developments and challenges in identity management.