- CAS Institute of Computing Technology
- CAaNES, LLC [RiskSense, Inc]
- CEA Tech en régions
- CEACI-THALES
- CESNET [Prague]
- CIDER
- CISCO Systems, Inc
- CITI Centre of Innovation in Telecommunications and Integration of services
- CMP-GC
- CNIL
- CNR Istituto di Scienza e Tecnologie dell’Informazione “A. Faedo” [Pisa]
- CREATE-NET
- CROCUS Technology
- CS-DISTRINET
- California Institute of Technology
- California Polytechnic State University [San Luis Obispo]
- California Sciences Institute
- California State University [Fullerton]
- California State University [Long Beach]
- California State University [Northridge]
- Canterbury Christ Church University
- Cardiff University
- Carinthia University of Applied Sciences
- Carleton University
- Carnegie Mellon University [Pittsburgh]
- Catholic University of Leuven = Katholieke Universiteit Leuven
- Center for Advanced Security Research Darmstadt [Darmstadt]
- Center for Advanced Studies [IBM CAS Canada]
- Center for Cybersecurity and Digital Forensics
- Center for Digital Safety & Security [Vienna]
- Center for Education and Research in Information Assurance and Security (Purdue University)
- Center for Electronic Governance
- Center for Information Management, Integration and Connectivity (Rutgers University)
- Center for Medical Biotechnology
- Center for REsearch And Telecommunication Experimentation for NETworked communities
- Center for Research and Exploration in Space Science and Technology [GSFC]
- Center for Research in Advanced Computing Systems
- Center for Secure Information Systems [Fairfax]
- Center for Usability Research and Engineering [Vienna]
- Centrale Lille
- CentraleSupélec
- Centre National de la Recherche Scientifique
- Centre Tecnològic de Telecomunicacions de Catalunya = Telecommunications Technological Centre of Catalonia
- Centre d'enseignement Cnam Paris
- Centre de Gestion Scientifique i3
- Centre d’Excellence en Technologies de l’Information et de la Communication
- Centre for Cybersecurity and Cybercrime Investigation [Dublin]
- Centre for Forensic Computing
- Centre for Health, Law and Emerging Technologies
- Centre for Quantifiable Quality of Service in Communication Systems
- Centre for Research in Complex Systems, School of Computing and Mathematics
- Centre for Robotics and Neural Systems
- Centre for Security, Communications and Network Research
- Centre for Strategic Economic Studies
- Centre for the Study of the Sciences and the Humanities
- Centro Universitário da FEI
- Centro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional
- Centrum Wiskunde & Informatica
- Certus Centre for Software Validation and Verification
- Chair in Information Systems III
- Chair of Mobile Business & Multilateral Security
- Chaire Valeurs Politiques des Informations Personnelles
- Chalmers University of Technology [Gothenburg, Sweden]
- Chalmers University of Technology [Göteborg]
- Changhong
- Charles Sturt University [Australia]
- Chercheur indépendant
- China Information Technology Security Evaluation Center
- Chinese Academy of Engineering
- Chinese Academy of Sciences [Beijing]
- Chinese Academy of Sciences [Changchun Branch]
- Chitkara University
- Chongqing Jiaotong University
- Chonnam National University [Gwangju]
- Christiansen IT Law [Seattle]
- Chung-Ang University [Seoul]
- Cisco Systems [Zürich]
- City University London
- City University of Hong Kong [Hong Kong]
- City University of New York [New York]
- Clausthal University of Technology
- Clemson University
- Cloud Creative Group
- Cloud and Security Lab [Bristol]
- CoSee GmbH [Darmstadt]
- Coalfire Systems
- Codes and Ciphers Limited [Richmond]
- College of Computer and Information Sciences [Riyadh]
- College of Information Sciences and Technology
- College of William and Mary [Williamsburg]
- Colorado State University [Fort Collins]
- Colorado Technical University
- Columbia University [New York]
- Commerzbank AG
- Commissariat à l'énergie atomique et aux énergies alternatives
- Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information
- Commission nationale de l'informatique des libertés
- Commonwealth Scientific and Industrial Research Organisation Energy Technology
- Commonwealth Scientific and Industrial Research Organisation [Australia]
- Communication and Computing Research Centre
- Communications Research Centre Canada
- Comp. Sci. Dept.
- Company Watch Ltd
- ComplexNetworks
- Computational Biology Center
- Computational and Information Sciences Directorate
- Computer Engineering Department
- Computer Engineering Department, Faculty of Engineering
- Computer Science Department
- Computer Science Department [SUNY]
- Computer Science Department of University of Malaga
- Computer Science VI
- Computer Science and Communications Research Unit [Luxembourg]
- Computer Science and Computer Engineering [Fayetteville]
- Computer Science and Engineering Department [NYU Tandon School of Engineering]
- Computer Science and Research Institute of Cyber Defense
- Computer Security Division
- Computer Security and Industrial Cryptography [KU Leuven]
- Computer Technology Institute and Press "Diophantus"
- Computer Technology Institute and Press "Diophantus" [Greece]
- Computing Department
- Computing Division
- Computing Laboratory
- Computing Science Laboratory - Oxford University
- Concordia Institute for Information Systems Engineering
- Concordia University [Montreal]
- Confidentialité, Intégrité, Disponibilité et Répartition
- Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain]
- Conservatoire National des Arts et Métiers [CNAM]
- Consiglio Nazionale delle Ricerche [Milano]
- Construction and Analysis of Systems for Confidentiality and Authenticity of Data and Entities
- Corelight
- Coresec Systems [Malmo]
- Cork Constraint Computation Centre
- Corporate technology Siemens
- Council for Scientific and Industrial Research
- Council for Scientific and Industrial Research [Pretoria]
- Coventry University
- Cranfield University
- Create-Net
- Cryptography and Computeralgebra, Department of Computer Science
- Curtin University
- Curtin University of Technology
- Customs and Excise Department [Hong Kong]
- CyberTree Research Institute
- Cybernetica [Tallinn]
- Cyprus University of Technology
- Czech Academy of Sciences [Prague]
- Czech Technical University in Prague