Christian Deppe received a Dipl.-Math. degree in mathematics from the Universität Bielefeld, Bielefeld, Germany, in 1996, and a Dr.-Math. degree in mathematics from the Universität Bielefeld, Bielefeld, Germany, in 1998. He was a Research and Teaching Assistant with the Fakultät für Mathematik, Universität Bielefeld, from 1998 to 2010. From 2011 to 2013, he was the project leader of the project ``Sicherheit und Robustheit des Quanten-Repeaters´´ of the Federal Ministry of Education and Research at Fakultät für Mathematik, Universität Bielefeld. In 2014, he was supported by a DFG project at the Institute of Theoretical Information Technology, Technische Universität München. In 2015, he had a temporary professorship at the Fakultät für Mathematik und Informatik, Friedrich-Schiller Universität Jena. He was the project leader of the project ``Abhörsichere Kommunikation über Quanten-Repeater´´ of the Federal Ministry of Education and Research at Fakultät für Mathematik, Universität Bielefeld. Since 2018, he has been at the Department of Communications Engineering at the Technical University of Munich.