Building bridges between diverse identity concepts using WebID

Abstract

Single sign-on systems enable users to log into different Web services with the same credentials. Major identity providers such as Google or Facebook rely on identity concepts like OpenID or OAuth for this purpose. WebID by the W3C offers similar features, but additionally allows for storing identity data in an expressive, extensible and machinereadable way using Linked Data. Due to differences in manageable user attributes and the authentication protocols as such, the identity concepts are incompatible to each other. With more than one identity concept in use, users need to remember or keep further credentials. In this paper we therefore propose the B3IDS approach. It aims at improving the user experience and the adoption of WebID by building bridges between diverse identity concepts with WebID. We exemplarily implement B3IDS in an existing WebID identity provider and management system.