Data mining is under attack from privacy advocates because of a misunderstanding about what it actually is and a valid concern about how it's generally done. This analysis shows how technology from the security community can change data mining for the better, providing all its benefits while still maintaining privacy. Recently, a new class of data mining methods, known as privacy preserving data mining (PPDM) algorithms has been developed by the research community working on security and knowledge discovery. The aim of these algorithms is the extraction of relevant knowledge from large amount...