In this paper, we describe the implementation of our identity provider, based on open web service standards, which has been extended to distinguish between different qualities of identity attributes; therefore enabling a relying party to distinguish between verified and unverified digital identities. Our contribution is the definition and representation of identity meta information for identity attributes on the identity provider side and the conveyance of this information as Identity Attribute

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... Context Classes to a relying party. As a main result, we propose a format and semantic to include identity attribute meta information into security token which are sent from the identity provider to a relying party in addition to the attribute value itself.