  In the next years the data transmission connections will constitute one of
the principal tools of communication among cities, enterprises and public
administration. With their enhanced connectivity, the systems and nets of
information are now exposed to an increased vulnerability and new safety
problems are emerging. Insofar Quantum Key Distribution (QKD) has matured to
real world applications and can enhance the safety of the communication nets.
In this paper we present the QKD network designed and implemented by Selex-SI
and we give an overview of the obtained results.
