01454nas a2200109   4500000000100000008004100001260000900042100001500051245011600066856006700182520109500249       2023                            d  c20231 aThea Riebe00aComputer Emergency Response Teams and the German Cyber Defense: An Analysis of CERTs on Federal and State Level  uhttps://link.springer.com/chapter/10.1007/978-3-658-41667-6_133 aBesides the merits of increasing digitization and interconnectedness in private and professional spaces, critical infrastructures and societies are more and more exposed to cyberattacks. In order to enhance the preventative and reactive capabilities against cyberattacks, Computer Emergency Response Teams (CERTs) are deployed in many countries and organizations. In Germany, CERTs in the public sector operate on federal and state level to provide information security services for authorities, citizens, and enterprises. Their tasks of monitoring, analyzing, and communicating threats and incidents is getting more complex due to the increasing amount of information disseminated into public channels. By adopting the perspectives of Computer-Supported Cooperative Work (CSCW) and Crisis Informatics, we contribute to the study of organizational structures, technology use, and the impact on collaborative practices in and between state CERTs with empirical research based on expert interviews with representatives of German state CERTs (N=15) and supplementary document analyses (N=25).