5G will transform the way how millions of individuals, organizations and devices connect to each other. It will also be the new basis for developments in the Internet of Things, driverless vehicles, connected homes and smart cities. Nevertheless, as is true of any revolution, 5G comes with its own challenges in terms of personal and corporate security, which must be taken into account and managed by companies, users and regulators. One of them is the development of communication systems only open to those who are indeed communicating, preventing eavesdroppers to interfere. This session will present the key topics for that debate.