- CIDER
- Catholic University of Leuven = Katholieke Universiteit Leuven
- Center for REsearch And Telecommunication Experimentation for NETworked communities
- Center for Usability Research and Engineering [Vienna]
- CentraleSupélec
- Centre National de la Recherche Scientifique
- Centre d’Excellence en Technologies de l’Information et de la Communication
- Chair of Mobile Business & Multilateral Security
- Chalmers University of Technology [Göteborg]
- Chercheur indépendant
- Cloud and Security Lab [Bristol]
- Commonwealth Scientific and Industrial Research Organisation [Canberra]
- Computer Security and Industrial Cryptography [KU Leuven]
- Computer Technology Institute and Press "Diophantus" [Greece]
- Confidentialité, Intégrité, Disponibilité et Répartition
- Coventry University
- Cranfield University