http://developers.de/blogs/damir_dobric/archive/2007/02/23/Problem-by-verification-of-SAML-token-.aspxWhen the SAML token is created by using of SbbSecurityTokenSerializer as shown in this example, the WCF builds XML file, which is signed according to Xml Signature specification. One example of some test SAML token created this way is shown below: <enCommunityServer 2008 SP1 (Build: 30619.63)