This report reflects the findings of a conference on cyber security and cyber crime in 2002 in The Hague, The Netherlands. It looks into the urgency for a better common understanding and better cooperation on these issues, in the light of the growth of the Internet, both in terms of number of users and in terms of social, cultural and economic impact. Focus was at three themes regarding the role of the public and the private sector in dealing with cyber security and cyber crime: What are the threats and what is the matrix of possible responses? How should Europe and the United States cooperate? How should the public and the private sector work together?