This volume constitutes the proceedings of the First European Conference on Intelligence and Security Informatics, EuroISI 2008, held in Esbjerg Denmark, December 3-5, 2008. Intelligence and security informatics (ISI) is a multidisciplinary ?eld enc- passing methodologies, models, algorithms, and advanced tools for intelligence analysis, homeland security, terrorism research as well as security-related public policies. EuroISI 2008 was the rst European edition of the series of ISI sym- siums that have been held annually in the USA since 2003, and more recently in Asia. These meetings gather...