... • Historical • XML Security • Web Services Security • OGSA Security • XML Web Services technology for IIDS - Discussion March 27, 2003 . Vrije Univer siteit, Amster dam XML Web Services Secu ... trust domains (security associations) March 27, 2003 . Vrije Univer siteit, Amster dam XML Web Services Secu rity Slide2_6 XML Security - Components • XML Signature • XML Encryption • Security Assertion ... siteit, Amster dam XML Web Services Secu rity Slide2_11 Web services features – three stacks March 27, 2003 . Vrije Univer siteit, Amster dam XML Web Services Secu rity Slide2_12 Web Service Description...