On May 12th 2025, the Meridian consortium held a knowledge building workshop on the topic of Privacy and security in C-ITS. This was the second workshop in a series of Digital Infrastructure workshops. The virtual workshop gathered over 30 participants and focused on the important role of security and privacy in C-ITS. In the session, partners from Germany, Italy and Belgium gave their outlook on how they implement necessary security or privacy measures in their C-ITS deployments and shared their successes, challenges and future outlooks on the topic. Participants had the chance to ask questions, encouraging knowledge building and collaboration. Overall, this was a successful and insightful knowledge building session.