Sebastian Rieger

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Over the past years web applications increased in number and complexity (driven by “Web 2.0” paradigm). Users need to manage different passwords to authenticate at these applications. Modern Web-based Single Sign-On solutions that reduce the complexity for usage and management of the users’ credentials can be categorized in federated(More)
Identity management (IDM) has driven many IT projects especially in large IT infrastructures. Like other projects that focused on security or authentication, e.g. Public Key Infrastructures (PKI), they do not only reduce complexity and ease administration, but have to be managed themselves. This leads to costs and effort being necessary before gaining the(More)
Several publishers, being used by researchers, have changed their access control from IP-based to federated authentication and authorization mechanisms typically based on the Security Assertion Markup Language (SAML). While offering unified authentication and authorization (Single Sign-On) across Web sites, SAML does not offer specific features to enable(More)
1 Stand derTechnik In dennachfolgenden Abschnitten diesesBeitragswerdeninKapitel 1Föderationenvon Speicher-Clouds, derZ ugangd azu, sowie die Authentifizierungu nd Autorisierungu nd das Problem derL okalisierungvon Benutzernbeschrieben.ImanschließendenKapitel 2 wird die Softwarearchitekturu nseres Vorschlags,inkl. derL okalisierungv on Benutzern in(More)