Researchers from TK and the Security&Privacy group from the University of Hamburg had a paper titled “Insiders Dissected: New Foundations and a Systematisation of the Research on Insiders” accepted at the ACM DTRAP Journal in 2021 with the Special Issue on Insider Threats. In the paper, the authors propose a systematic approach to dissect the defining aspects of insiders, which includes specific allocatable insider characteristics. Additionally, the insider characteristics are extended toward insider types, which establish universal and unambiguous names for different insiders and which are related with each other to form a new and simple insider taxonomy. The new foundations on insiders allow the comparison of different insider research in a structured manner. Furthermore, the new approach facilitates the identification of specific features of insider threats in future work.