Effective anticipation and response to the characteristics of today's security threats require an effective information sharing (IS) component. The need for IS and the relative benefits that come with it are evident to most security stakeholders. Information sharing has become even more urgent as the extreme adaptability of our adversaries and the relative rigidity of our current security organisations, in both the public and private sectors, have become increasingly clear. Many governments have already recently issued specific IS policies, stating the objectives as well as launching operational initiatives. The European Union has also introduced an IS objective within its more general program of critical (information) infrastructure protection and has recently launched several research and pilot instruments for IS solutions. Many challenges to develop successful IS models still exist, particularly in the security environment. Most notably, there is a tendency to dedicate excessive attention to technology concerns and solutions. A successful IS model, however, needs to comprehend and incorporate a more multidimensional strategic approach and focus on the concept of IS as a market place value.