Abstract
In this talk, we will present the current state of the art in the implementations of two-party quantum cryptographic protocols such as key distribution and coin flipping. We will discuss the challenges that appear in the effort to satisfy assumptions present in theoretical security proofs using practical systems, and the solutions that have been adopted in the last years. These have allowed implementations offering strong security guarantees and have opened the way to new theoretical investigations motivated by the need to accommodate for experimental imperfections.