Secure digital identities (SDI) are an essential driving force for the successful transition of business processes to the digital world. This applies to both the economy (e.g., conclusion of insurance contracts and opening of accounts online) and administration (in accordance with the German Online Access Act (OZG), administrative services provided by the German federal government and the German state governments must also be accessible digitally by the end of 2022). Fraunhofer AISEC’s research in this area focuses on not only identity solution security but also interoperability, privacy and usability. We support identity providers in implementing these objectives, researching and developing new methods to implement secure electronic identities.