The 4th International Workshop on Emerging Network Security (ENS 2021) to be held in the conjunction with the ARES workshops EU Projects Symposium 2021 at 16th International Conference on Availability, Reliability and Security (ARES 2021 - http://www.ares-conference.eu) August 17 - August 20, 2021 Important Dates Submission Deadline May 13, 2021 Author Notification June 01, 2021 Proceedings Version June 13, 2021 ARES EU Symposium August 17, 2021 All-Digital Conference August 17 - August 20, 2021 Overview With the great success and development of 5G & beyond systems and other emerging concepts (e.g. 6G) a continued effort toward rich ubiquitous communication infrastructure, promising wide range of high-quality services is desired. It is envisioned that communication in emerging networks will offer significantly greater data bandwidth and almost infinite capability of networking resulting in unfaltering user experiences for, among others: virtual/augmented reality, massive content streaming, telepresence, user-centric computing, crowded area services, smart personal networks, Internet of Things (IoT), smart buildings and smart cities. The communication in 5G networks and beyond is currently in the center of attention of industry, academia, and government worldwide. Emerging network concepts drive many new requirements for different network capabilities. As future networks aim at utilizing many promising network technologies, such as Software Defined Networking (SDN), Network Functions Virtualization (NFV), Information Centric Network (ICN), Network Slicing or Cloud Computing and supporting a huge number of connected devices integrating above mentioned advanced technologies and innovating new techniques will surely bring tremendous challenges for security, privacy and trust. Therefore, secure network architectures, mechanisms, and protocols are required as the basis for emerging networks to address these issues and follow security-by-design approach. Finally, since in current and future networks even more user data and network traffic will be transmitted, big data security solutions should be considered in order to address the magnitude of the data volume and ensure data security and privacy. From this perspective, the ENS 2021 workshop aims at collecting the most relevant ongoing research efforts in emerging network security field. It also serves as a forum for 5G & beyond projects in order to disseminate their security-related results and boost cooperation, also foster development of the 5G and beyond Security Community made of 5G security experts and practitioners who pro-actively discuss and share information to collectively progress and align on the field. Last but not least it also aims to bridge 5G & Beyond community with other communities (e.g. AI) that are key to support full attainment of 5G & Beyond but also 6G promises and so for those technologies to release their full potential. The ENS 2021 workshop builds upon three successful editions of the 5G-NS (5G Networks Security) workshop organized previously in co-location with the ARES conference in 2018, 2019, and 2020. Topics of interest for current and emerging networks (5G & Beyond, 6G, …) include, but are not limited to: - Security Architecture and Technologies - Security Management and its automation - Attack & Threat Detection - DDoS Detection & Mitigation - Security Frameworks for Various Applications & Scenarios - Access Control Security - Security Protocols - Security Management and Orchestration of NFV and SDN Elements - Software Defined Security - Security as a Service - Trusted Computing with NFV and SDN - Physical Layer Security - Wireless Communications Security - SDN/NFV Security - Core Network Security - Terminal and Edge Computing - Security of MEC Infrastructure - Malware Attack Detection and Prevention Techniques - Information Sharing and Data Protection - Big Data Security and Analytics - AI-enabled Security - Cloud Technologies Security - Privacy Preservation and Enhancement - Intrusion Detection and Content Access Control - Trust Management in Heterogeneous - Identity Management and Trustworthiness - Intelligent Security Provisioning - Trust Collaboration - Liability in Current and Emerging Networks - Compliance with legislation and regulation that apply IoT security and trust - 5G/6G, etc. and Artificial Intelligence - Named Data Networking Workshop Chairs Wojciech Mazurczyk, Warsaw University of Technology, Poland (IoRL H2020 Project) Pascal Bisson, Thales, France (5GDrones & INSPIRE-5Gplus H2020 Project, 5G IA SEC WG chair) Krzysztof Cabaj, Warsaw University of Technology, Poland (IoRL H2020 Project) Edgardo Montes de Oca, Montimage, France (Networld2020 steering board member) Submission Guidelines The submission guidelines valid for the workshop are the same as for the ARES conference. They can be found at https://www.ares-conference.eu/conference/submission/ . Papers accepted by the workshop will be published in the Conference Proceedings of ARES 2021 that will be published by the International Conference Proceedings Series published by ACM (ACM ICPS).