Hillenbrand, MarkusGötze, JoachimMüller, JochenMüller, PaulKnop, Jan VonHaverkamp, WilhelmJessen, Eike2019-10-112019-10-1120053-88579-402-0https://dl.gi.de/handle/20.500.12116/28611The Web service specifications managing authentication and authorization are still a work in progress. A large-scale application built today is in need of a solid authentication and authorization infrastructure. A role-based authentication, authorization and accounting (AAA) concept is able to provide the services needed, while it is possible to gain additional flexibility to handle the co-operation between different authentication and authorization infrastructures.enText/Conference Paper1617-5468