In an increasingly interconnected world, establishing trust between endusers and service providers with regards to privacy and data protectionis becoming increasingly important. Consequently, CREDENTIAL, fundedunder the European Union’s H2020 framework programme, was dedicated tothe development of a cloud-based service for identity provisioning and datasharing. The system aimed at offering both high confidentiality and privacyguarantees to the data owner, and high authenticity guarantees to the receiver. This was achieved by integrating advanced cryptographic mechanisms intostandardized authentication protocols. The developed solutions were testedin pilots from three critical sectors, which proved that high user convenience,strong security, and practical efficiency can be achieved at the same timethrough a single system.