SPEAR co-organises with the following H2020 projects: ASTRID, CYBER-TRUST, GUARD, SIMARGL, DataVaults, RAINBOW, and SIMARGL the 3rd International Workshop on Cyber-Security Threats, Trust and Privacy Management in Software-defined and Virtualized Infrastructures (SecSoft) co-hosted at the 7th IEEE International Conference on Network Softwarization (NetSoft2021) that will be held from June 28 to July 2, 2021, in Tokyo, Japan. SecSoft 2021 workshop homepage: https://www.astrid-project.eu/secsoft/. SPEAR participates in the Technical Program Committee of SecSoft 2021 with Panagiotis Sarigiannidis from the University of Western Macedonia.