Under CopyrightLämmel, PhilippPhilippLämmelTcholtchev, NikolayNikolayTcholtchevSchieferdecker, InaInaSchieferdecker2022-03-1319.1.20182017https://publica.fraunhofer.de/handle/publica/39930510.1145/3147234.3148087en004Enhancing cloud based data platforms for Smart Cities with authentication and authorization featuresconference paper