Web and Information Security consists of a collection of papers written by leading experts in the field that describe state-of-the-art topics pertaining to Web and information systems security. In particular, security for the semantic Web, privacy, security policy management and emerging topics such as secure semantic grids and secure multimedia systems are also discussed. As well as covering basic concepts of Web and information system security, this book provides new insights into the semantic Web field and its related security challenges. ""Web and Information Security"" is valuable as a reference book for senior undergraduate or graduate courses in information security which have special focuses on Web security. It is also useful for technologists, researchers, managers and developers who want to know more about emerging security technologies.