Outline of the SECOQC Quantum-Key-Distribution Network in Vienna
  A Quantum Key Distribution (QKD) network is currently implemented in Vienna by integrating seven QKD-Link devices that connect five subsidiaries of SIEMENS Austria. We give an architectural overview of the network and present the enabling QKD-technologies, as well as the novel QKD network protocols. 
Andreas Poppe, Momtchil Peev, Oliver Maurhart (on behalf of the   Integrated European Project SECOQC)