TRUSTEE (daTa pRivacy and cloUd SecuriTy clustEr Europe) is a network of 11 research projects funded by the European Union that was established within the Common Dissemination Booster initiative. The cluster is coordinated by CREDENTIAL, and furthermore subsumes the following projects: MUSA, PRISMACLOUD, SecureCloud, SERECA, SPECS, SUNFISH, SWITCH, TREDISEC, UNICORN, and WITDOM, which are all performing cutting-edge research and innovation in different domains of cloud security and privacy, ranging from secure and privacy-friendly authentication over encrypted and distributed solutions for data sharing and cloud storage to data integrity, authenticity, and availability.