Quantum Key Distribution Networks

Norbert L├╝tkenhaus

The threat of quantum computers force us to develop quantum safe methods of cryptography. In this presentation I will review the status of quantum key distribution (QKD) protocols and their implementations to show their advantages and limitations. Special focus will be on network technologies aimed to extend QKD applications to the multi-user scenario and to larger distances. Along the way I will point out challenges and opportunities for the QKD based approaches.