Quantum Key Distribution (QKD) is a technique for securely establishing symmetric cryptographic keys between two distant authenticated users, commonly called Alice and Bob. This key can then be used as a one-time pad to encrypt messages or any other cryptographic task. In contrast to key distribution protocols currently in use, the secrecy of keys obtained via QKD does not depend on assumptions about the computational hardness/complexity of certain mathematical problems (for example, factorization of large numbers). Therefore, they provide security even in the presence of an eavesdropper having access to quantum computers. There are two big families of QKD protocols — list of instructions Alice and Bob follow to establish a shared quantum key — Discrete Variable (DV) protocols and Continuous Variable (CV). DV-QKD protocols usually work with single photons and rely on single-photon detectors. For example, the most prominent member of this family of protocols is the well-known BB84 protocol which uses the polarization of photons to encode information. In contrast, CV-QKD protocols encode the information into the field-quadratures of laser light and only requires rather standard telecommunication equipment like photodiodes. Our group focusses mainly on DV-QKD and aims to turn our knowhow from entanglement distribution theory into novel ways of doing QKD and designing QKD protocols. Currently, we are working on ways to utilize high-dimensional entanglement to increase the noise-resistance and key rate of QKD protocols (see [1-4]).