Tag: Quantum

The ongoing development of quantum computers affects the security of currently used encryption and authentication schemes. Therefore, this document presents 'Post Quantum Cryptography' (PQC) and 'Quantum Key Distribution' (QKD). PQC describes software based approaches for quantum safe encryption and...

Before a new technology can be commercially used on a large scale, first some practical experience has to be obtained. This is usually done in testbeds, where commercial hardware is used under realistic conditions. Quantum Key Distribution (QKD) facilitates the generation of common secret random nu...

Despite some issues there already exist practical considerations and network realizations especially regarding Metropolitan Area Networks. In the fifth part (videos 38-52) the tutorial, presents aspects regarding the coexistence with classical data and selected testbeds, including the entanglement b...

Next to the generation of quantum keys, e.g. for single-use password, their use to setup secured networks is an important topic. In the fourth part (videos 28-37) the tutorials explains how quantum secured networks are set up and presents security strategies and how keys are distributed in the netwo...

Since repeating in quantum networks is not ready for operation anytime soon, a more modest approach is needed for network construction. The remedy is smaller-scale and more tightly meshed networks in the 100 km range. This places higher demands on security and performance, especially for key generat...

The two application areas 'Time&Frequency' (T&F) and 'Quantum Communication' (QuC) have special technical requirements for data networks. For the transfer of high-quality signals, T&F requires bi-directional amplification, which in conventional data networks requires the signals to be...

"Quantum repeating" is a core element of a functioning transmission of information over a larger distance. Due to the no-cloning theorem, creating a quantum duplicate, as is common in classical signal processing, is not possible. Therefore, it requires new network devices such as quantum memories an...