The document discusses several projects related to federated access control for UK e-science. It describes technologies like role-based access control, digital certificates, and attribute certificates. It also summarizes several specific projects, including GLASS for authentication at the University of Glasgow, SEE-GEO for secure geolinking services, and SPAM-GP for credential and attribute management across infrastructures. Key challenges discussed are linking different identity providers, managing digital certificates for users, and determining the best ways to store and assert user roles and privileges.