As e-government applications are coming of age, security has been gradually becoming more demanding a requirement for users, administrators, and service providers. The increasingly widespread use of Web services facilitates the exchange of data among various e-government applications, and paves the way for enhanced service delivery. Secure E-Government Web Services addresses various aspects of building secure e-government architectures and services, and presents the views of experts from academia, policy, and the industry to conclude that secure e-government Web services can be deployed in an application-centric and interoperable way. Secure E-Government Web Services presents the promising area of Web services, shedding new light onto this innovative area of applications, and responding to the current and upcoming challenges of e-government security.