Do WS-Security's granular X.509 digital signatures and X.509 encryption justify certificate management and performance problems? Find out how the Microsoft WSDK X.509 implementation's network traffic and execution times compare with client-side HTTPS/SSL 3.0 encryption. Download a Visual Basic .NET Windows form client and a set of XML Web services to test execution time of local and remote services. The ASP.NET clone of the project is at http://www.oakleaf.ws/WsdkX509ClientASP/.