This volume constitutes the refereed proceedings of the 9th International Conference on Multimedia Communications, Services and Security, MCSS 2017, held in Krakow, Poland, in November 2017.The 16 full papers included in the volume were selected from 38 submissions.

This book constitutes the proceedings of the 11th International Conference, MCSS 2022, held in Kraków, Poland, during November 3–4, 2022.The 13 full papers included in this book were carefully reviewed and selected from 33 submissions. The papers cover ongoing research activities in the following topics: cybersecurity, multimedia services; intelligent monitoring; audio-visual systems; biometric applications; experiments and deployments.