Extending the 0Auth2 Workflow to Audit Data Usage for Users and Service Providers In a Cooperative Scenario

The increasing amount and heterogeneity of devices demands changes in IT infrastructure. Many web service architectures used to meet these demands use the OAuth2 workflow to secure their interfaces. These implementations usually tightly couple web services and an OAuth2 authorization service. The presented extension to the OAuth2 workflow is capable handling authorizations for multiple attached services and therefore combines existing services of a central IT service provider but also allows other services running in a cooperative model with only a single instance of the authorization server. Based on auditing parameters it is possible to present access per resource or per method giving service providers and application developers more insight in how their services are used and show users by whom their personal data is used.