This book constitutes the refereed proceedings of six International Workshops that were held in conjunction with the 26th European Symposium on Research in Computer Security, ESORICS 2021, which took place during October 4-6, 2021. The conference was initially planned to take place in Darmstadt, Germany, but changed to an online event due to the COVID-19 pandemic. The following papers are available open access under a Creative Commons Attribution 4.0 International License via link.springer.com: by Michael Friedewald, Ina Schiering, Nicholas Martin, and Dara Hallinan  weiterlesen