Security of Quantum Key Distribution: Part 9 - Security Definition

This is the ninth part of a series of videos about the concepts of quantum key distribution with special emphasis on the security of such protocols. It is aimed at students who are already familiar with quantum mechanics but haven't encountered quantum information theory yet. Here we discuss how to define the security of security of a QKD protocol. Furthermore, we discuss what kind of assumptions one makes in QKD protocols, especially with regard to the implementation of such protocols. This lecture has resulted in the textbook "Quantum Key Distribution - An Introduction with Exercises", which has been published by Springer in the series "Lecture Notes in Physics". You can find it here: https://www.springer.com/book/9783030739904