- T-Systems International GmbH
- TNO Information and Communication Technology
- Tabaq Software [Lahore]
- Tainan University of Technology
- Tallinn University of Technology
- Talos Security, s.r.l.s.
- Tampere University of Technology [Tampere]
- Tandy School of Computer Science [Tulsa]
- Technical University Hamburg Harburg [Hamburg]
- Technical University of Berlin | Technische Universität Berlin
- Technical University of Cluj-Napoca
- Technical University of Crete [Chania]
- Technical University of Lisbon
- Technicolor
- Technicolor [Cesson Sévigné]
- Technikon Forschungs- und Planungsgesellschaft mbH
- Technische Universitat Darmstadt Fachbereich Informatik, Kryptographie und Computeralgebra
- Technische Universität Braunschweig = Technical University of Braunschweig [Braunschweig]
- Technische Universität Darmstadt - Technical University of Darmstadt
- Technische Universität Dortmund [Dortmund]
- Technische Universität Dresden = Dresden University of Technology
- Technische Universität Hamburg-Harburg
- Technische Universität Ilmenau
- Technische Universität Munchen - Technical University Munich - Université Technique de Munich
- Technological Educational Institute of Athens
- Technological Educational Institute of Central Macedonia
- Technological Educational Institute of Crete
- Technological Educational Institute of Eastern Macedonia and Thrace
- Technologie-Zentrum Informatik und Informationstechnik
- Technology and Innovation Unit
- Tel Aviv University
- Telecom Italia
- Telekom Innovation Laboratories
- Telenor GBD&R
- Telenor Key Partner [Oslo]
- Telstra
- Temple University [Philadelphia]
- Texas Tech University [Lubbock]
- The Aerospace Corporation
- The Alan Turing Institute
- The Castlegate Consultancy [United Kingdom]
- The Chinese University of Hong Kong [Hong Kong]
- The Data-Driven Institute
- The George Washington University
- The Government of the Hong Kong Special Administrative Region
- The Hong Kong Polytechnic University [Hong Kong]
- The MITRE Corporation
- The MITRE corporation
- The National Research Nuclear University MEPhI (Moscow Engineering Physics Institute) [Moscow, Russia]
- The Netherlands Bank [Amsterdam]
- The Netherlands Organisation for Applied Scientific Research
- The Open University [Milton Keynes]
- The Open University of Israel
- The Research Council of Norway
- The University of Electro-Communications [Tokyo]
- The University of Hong Kong
- The University of New Mexico [Albuquerque]
- The University of Newcastle
- The University of Tennessee [Knoxville]
- The University of Texas at San Antonio
- The University of Tokyo
- Theorematica Spa [Roma]
- Thomas J. Watson Research Center
- Thomson R&D, Security Competence Center
- Threat Analysis and Mitigation for Information Security
- Tianjin University
- Tilburg Institute for Law, Technology and Society (TILT)
- Tilburg Institute for Law, Technology, and Society (TILT)
- Tilburg Institute for Law, Technology, and Society [Netherlands]
- Tilburg University [Netherlands]
- Toho University
- Tohoku Bunka Gakuen University
- Tohoku University [Sendai]
- Tokai University
- Tokaï University
- Tomorrow Explored
- Tongji University
- Toulouse Mind & Brain Institut
- Towson University [Towson, MD, United States]
- Toyota ITC
- Toyota InfoTechnology Center Co [Mountain View]
- Trier University of Applied Sciences
- Trinity College Dublin
- Trinity International University
- Trust and Security
- Trusted Labs
- Tsinghua University [Beijing]
- Télécom Bretagne
- Télécom Paris
- Télécom ParisTech
- Télécom SudParis
- Tübitak Bilgem