"Providing a comprehensive guide to security for web services and SOA, this book covers in detail all recent standards that address web service security, including XML Encryption, XML Signature, WS-Security, and WS-SecureConversation. It also reviews recent research on access control for simple and conversation-based web services, advanced digital identity management techniques, and access control for web-based workflows. With illustrative examples and analyses of critical issues, the book is a solid reference on web service standards, a practical overview for researchers looking for innovative new directions,and a suitable textbook on advanced topics in computer and system security"--provided by publisher