This paper summarizes the results of a workshop at the IFIP Summer School 2016 introducing the EU Horizon 2020 project credential, i.e., Secure Cloud Identity Wallet. The contribution of this document is three-fold. First, it gives an overview of the credential project, its use-cases, and core technologies. Second, it explains the challenges of the project’s approach and summarizes the results of the parallel focus groups that were held during the workshop. Third, it focuses on a specific challenge—the protection of metadata in centralized identity providers—and suggests a potential architecture addressing this problem.