Extension of OpenID Connect for Utilizing Attributes2016 · There are countless attributes for users on the Internet and service providers can provide a variety of services with them. In recent years, identity federation frameworks have been used widely for single-sign-on and attribute exchange. Alternatively, service providers sometimes require users to disclose their attributes unnecessarily. In this paper, we propose an extension of OpenID Connect to utilize the abovementioned attributes appropriately. The proposed method uses an identity federation framework with attributes. It enables users to prove their attributes and service providers to use these attributes.