Nicolai M. Josuttis discusses various issues encountered when implementing SOA security: heterogeneity and debugging are problematic, ESB plays an important role, and costs involved.
Blake Dournaee presents Intel’s Service Gateway, a security control point meant to secure on-premise and in the cloud .NET/Java-based web services from various security threats.
Harold van Aalst addresses SOA governance at runtime by having a tool capable of discovering when rules or policies are broken in order to be able to act on time to limit the potential damage.
Miko Matsumura teaches SOA Foundations: Definitions, Patterns, and evolution toward SOA. An excerpt from webMethods SOA Master Class.