ERATOSTHENES organized the International Workshop on Advances on Privacy Preserving Technologies and Solutions (IWAPS 2021) that took place in conjunction with the ARES International Conference on Availability, Reliability and Security (16-17 August 2021). The workshop was co-organized by four EC, research, projects: OLYMPUS, INCOGNITO, ERATOTHENES and CybeSec4Europe with the project coordinators presenting the projects’ concept and recent results. The session held 10 peer-reviewed publications in a multidisciplinary approach under the scope of IoT Privacy Preserving Technologies and Solutions. ERATOSTHENES was represented by INLECOM INNOVATION (Konstantinos Loupos, project coordinator) and other partners such as UMU (Antonio Skarmeta, Scientific manager) and UPRC (Christos Xenakis). An overall ERATOSTHENES presentation opened the scene and set the ground on recent IoT-related challenges and opportunities.