Digital transformation cyber security and resilience : Second International Conference DIGILIENCE 2020 Varna Bulgaria September 30 October 2 2020 ; revised selected papers This volume constitutes revised and selected papers presented at the First International Conference on Digital Transformation Cyber Security and Resilience DIGILIENCE 2020 held in Varna Bulgaria in September October 2020. The 17 papers presented were carefully reviewed and selected from the 119 submissions. They are organized in the topical sections as follows: cyber situational awareness information sharing and collaboration; protecting critical infrastructures and essential services from cyberattacks; big data and artificial intelligence for cybersecurity; advanced ICT security solutions; education and training for cyber resilience; ICT governance and management for digital transformation