Tatiana Jančárková is a researcher at the Law Branch of NATO CCDCOE. Her current research interests include application of international law to cyberspace operations (Cyber Law Toolkit project), protection of critical information infrastructure and cybersecurity related aspects of 5G technologies. She has previously served as legal adviser and the Head of International Organisations and Law Unit at the Czech National Cyber and Information Security Agency (NÚKIB), and has practised in the fields of human rights law and international criminal law. Tatiana holds degrees in law and in Russian and East European studies from Charles University in Prague and an LL.M. in public international law from Leiden University.