... 2003. Vrije Universiteit, Amsterdam XML Web Services SecuritySlide2_2Outlines•Historical• XML Security • Web Services Security•OGSA Security• XML Web Services technology for IIDS - DiscussionMarch ... Amsterdam XML Web Services SecuritySlide2_11 Web services features – three stacksMarch 27, 2003. Vrije Universiteit, Amsterdam XML Web Services SecuritySlide2_24Open Grid Services Architecture ... Amsterdam XML Web Services SecuritySlide2_4 XML Basics: DTD, Schema, XML Protocol, etc.DTD is document-oriented•Like HTMLSchema is data-oriented• XML Signature•SAMLBasic XML Protocol(s)• XML- RPC•SOAPXForms,...