T. Tagarev, N. Stoianov, G. Sharkov & Y. Yanakiev, vol. 50, no. 1 (2021): 5-8 https://doi.org/10.11610/isij.5000 Published since 1998 ISSN 0861-5160 (print), ISSN 1314-2119 (online) Editorial  E-mail: tagarev@bas.bg AI-driven Cybersecurity Solutions, Cyber Ranges for Education & Training, and ICT Appli- cations for Military Purposes Todor Tagarev 1 (), Nikolai Stoianov 2 , George Sharkov 3 , Yantsislav Yanakiev 2 1 Institute of Information and Communication Technologies, Bulgarian Academy of Sciences, Sofia, Bulgaria, http://www.iict.bas.bg/EN 2 Bulgarian Defence Institute “Prof. Tsvetan Lazarov,” Sofia, Bulgaria, https://www.di.mod.bg 3 European Software Institute – Center Eastern Europe, Sofia, Bulgaria, https://esicenter.bg/ A BSTRACT : This editorial article introduces the reader to the Third International Scientific Conference “Digital Transformation, Cyber Security and Resilience,” DIGILIENCE 2021, and summarises the results from four of its sessions: AI-driven Cybersecu- rity Solutions; Organisational and Ethical Considerations in Providing Cybersecu- rity; Cyber Ranges for Innovative Education & Training; and Advanced ICT Solu- tions with Military Applications. KEYWORDS: digital transformation, artificial intelligence, intrusion detection, collabo- rative network organisation, human factors, situational awareness, cybersecurity ethics, cyber range, ECHO project Creative Commons BY-NC 4.0 Rapid technological developments provide numerous opportunities to enhance performance and create new security and defence capabilities. To utilise their potential, organisations need to innovate and transform while paying due at- tention to their protection against attacks from cyberspace and overall resili- ence. To reflect on these developments, a group of senior researchers with pol- icy-making experience decided in 2018 to launch a series of international