This book contains papers presented at the ninth International Conference on Data Mining, Protection, Detection and other Security Technologies held at the University of Cädiz in Spain, 2008. The applications of Data Mining are important in business, particularly large companies and government agencies, and this market is still going through a period of consolidation. This is reflected in the important transactions that have recently taken place, such as the purchase of Datops by Lexis Nexis and of ClearForest by Reuters, followed by the buying of Inxight by Business Object, later itself acquired by SAP. These vibrant market movements are to be expected in a comparatively young discipline not yet consolidated, and point to the importance of pursuing research and new applications such as some of those described in this book.

The papers in these proceedings are arranged into the following topic areas: Data Mining; Text Mining; Business and Socioeconomic Applications; Security Issues; Risk Analysis.