What is does the term cyber security hide? Who and why threatens the security of information on the Internet? But also what lessons does China, for example, take from the conflict in Ukraine for its own war plans (e.g. against Taiwan?) The public debate was organized by the PANT Centre Ostrava in cooperation with Sinopsis as part of the expert accompanying programs of the NATO Days in Ostrava 2023 with the support of Jagello 2000 – NATO Information Centre.